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Drivetrain

SRAM Red eTAP Electric Road Kit
$2,175.00 - $2,374.99
Step up to the next generation in shifting with SRAM's wireless RED eTAP electric road drivetrain kit. Each kit contains: - SRAM RED eTAP shift/brake levers - SRAM RED eTAP wireless front and rear derailleurs - SRAM eTAP batteries - Battery charger - USB stick - Quick-start guide
SRAM RED 22 Quarq Power Meter Crankset (No Chainrings)
$1,830.99
The RED 22 Quarq Power Meter Crankset takes SRAM's brilliantly stiff, incredibly light RED cranks and marries them to an integrated, ultra-precise Quarq Power Meter for feathery low weight and accurate power measurement. In addition to those remarkable feats, it also delivers the the incredible power transfer of SRAM's hollow Exogram carbon crankarms. Feel every watt course through the crank and propel you forward, while every iota of your strength is recorded with an accuracy of +/- 1.5%. And, to make setup as easy as possible it features an easily accessible, weather-tight battery compartment.
Quarq DFour Power Meter Crankset
$1,564.99
When Quarq set out to build their next-generation power meter, they wanted to build the best-performing power meter for every facet of cycling and triathlon, and for riders at every level. Like its Quarq brethren, the new DFour measures power in the heart of the bicycle — the crankset spider, scientifically proven to be the place for the most accurate measurement. With a new measurement circuit, revised strain gauge design, improved accuracy throughout the pedal stroke and software advances built into the Qalvin App, the DFour represents the state of the art in power meter technology. Every innovation in Quarq’s next-generation DZero platform is channeled into the DFour Power Meter Crankset. It embodies 10 years of Quarq technology advances with new features such as dual Bluetooth low energy and ANT+ wireless data transfer, the new Qalvin BLE app and compatibility with BB386EVO bottom brackets. - The DFour power meter is a bolt-on upgrade for Shimano’s 11-speed Dura-Ace 9000, Ultegra 6800 and 105 5800 drivetrains. - Must be paired with a compatible SRAM bottom bracket. - ELSA RS power meter owners can upgrade using the DFour Power Meter Spider. - Free firmware upgrades with the Qalvin app. - Compatible with BB30 bottom bracket. - BB30 versions ship with the spacers and wave washer required for BB386EVO installation.
Quarq DZero Carbon Power Meter Crankset
$1,387.00
When Quarq set out to build their next-generation power meter, they wanted to build the best-performing power meter for every facet of cycling and triathlon, and for riders at every level. Like its Quarq brethren, the new DZero measures power in the heart of the bicycle—the crankset spider, scientifically proven to be the place for the most accurate measurement. With a new measurement circuit, revised strain gauge design, improved accuracy throughout the pedal stroke and software advances built into the Qalvin App, the DZero represents the state of the art in power meter technology As Quarq’s next generation of power meters, the DZero combines 10 years of technology advances with new features such as dual Bluetooth low energy and ANT+ wireless data transfer, the new Qalvin BLE app and, for the carbon version, compatibility with BB386EVO bottom brackets. - 10K temperature compensation: Eliminates variables caused by heat and cold to provide an unwavering record of your performance through all conditions - Built to last: Features an IPX7 waterproof rating - Material: CNC Machined Aluminum Spider, Exogram Carbon Crank Arms - Accuracy: 1.5% - Bolt Circle Diameter: 130 BCD, 110 BCD - Q-Factor: 145mm - Wireless Technology: ANT+, Bluetooth low energy technology - Battery: CR2032, 200 hours of riding time - Weight: 578/559 grams (130/110 BCD) - Head Unit Compability: ANT+ and Bluetooth low energy technology compatible head units (available separately) - Compatibility: Traditional 5 bolt chainrings from most manufacturers. Hidden (HB) and Non-hidden Bolt (NHB) patterns. 10-speed, 11-speed, 1X and 2X. *Not compatible with Campagnolo chainrings
Campagnolo Super Record 12x2 Speed Crankset
$1,325.00
The new Super Record 12x2 Speed crankset: an intense concentration of innovation that results in the greatest possible stiffness and precision in derailing, whilst providing a dedicated aerodynamic “super design." The new carbon fiber Super Record 12x2 Speed crankset has been made lighter on the inside through Campagnolo Hollow Technology, which uses the Ultra-Torque bracket system with a titanium axle to transfer all of the force the athlete applies to the pedal to the drivetrain. The new Super Record 12x2 Speed crankset can be installed on any type of frame, whether or not it is being used with disc brakes because it optimizes the chain line on the frame with a rear hub flange measuring 130, 135 or 142 millimeters, without affecting the Q factor, which remains constant at 145.5 millimeters thanks to the new hand crank design. The use of ceramic Cult bearings leads to obtaining the smooth ride that the Campagnolo brand is known for. The innovative design of the outer chainring ensures faster, quieter derailing owing to the contoured pin. The symmetrical design of the inner chainring teeth allows improved stability with chain crossovers. The double wheel sizing standards (112 and 145 millimeters) combined with the eight fixing screws, optimize weight and stiffness through the increased use of carbon fiber. The varying number of pins for each of the three chainring combinations (34/50, 36/52, 39/53) facilitates upshifting due to the optimized free strokes associated with each combination. The special drains on the inside of the outer chainrings optimize performance when downshifting in dead spots.
Shimano Dura-Ace R9170 Di2 Hydrualic Disc Brake/Lever Set
$849.99 - $1,299.99
Shimano dual control hydraulic disc brake levers. - More controllable and confidence in race condition - Optimally balanced hydraulic brake system for racing - Dedicated brake lever shape, stroke, contact point, stiffness and dedicated shift paddles - Lightweight - Carbon composite plastic material of hood - More intuitive, quicker shifting operation - More defined click feeling and ergonomic shift lever position - Customizable function to fit any riding style - Each switch has the option for multi-shift ON or OFF - E-TUBE project - Optimum power transmitted with grip firmly - Ideal ergonomic cover shape with better thickness & tenderness - Openable hood cover - Simple set up and maintenance - Easy replace hood cover - Openable hood cover - Customizable the function to fit in rider's riding style
Campagnolo Super Record Carbon Crankset
$1,085.00 - $1,265.00
The road steepens, but instead of slowing down, you push harder on the pedals and fly up the hill as all of your power turns into speed thanks to your Campagnolo Super Record Ultra-Torque Crankset. It sports a unique, integrated titanium spindle design that joins the two sides of the crankset together via a toothed Hirth joint in the center. And for ultra-smooth pedaling, the crankset comes with ceramic bottom-bracket bearings that fit into outboard cups (sold separately). The aesthetically arresting design provides incredible stiffness, while Campagnolo's unified BCD (145/112mm) allows for all 3 chainring standards. Plus, the Super Record chainrings sport special pins and plating for fast, silent shifts and long life. - Chainrings included: Yes - Drivetrain speeds: 11 - Number of chainrings: Double - Spindle interface type: Campagnolo Ultra-Torque
Quarq Riken AL Crankset
$1,249.99
Quarq's Riken AL power meter crankset uses the same power meter spider as RIKEN R, but with forged aluminum crank arms instead of carbon fiber. Power measurement takes place in the crankset spider — the heart of your bicycle. Its sole job: to convert the effort from both legs to forward motion. - 10K temperature compensation eliminates temperature effects on power measurement. - AxCad accelerometer cadence removes the need for a magnet. - The LED and visible ANT+ ID streamline installation and operation. - OmniCal means you can change chainrings without affecting accuracy. - Spindle interface: Truvativ GXP - Spindle diameter: 24-22 stepped
Shimano Dura-Ace 9120 11-Speed Dual Control Levers w/Hydraulic Brakes
$499.99 - $1,104.99
- Quick And Intuitive Rear Shifting Operation - Shorter Lever Stroke - Redesigned Internal Shifting Unit - Lighter Front Shifting Operation - Redesign Front System With New Front Derailleur - Comfortable Grip And Operation - More Customizable And Precise Lever Position - Expanded Reach Adjustment Range (14 Mm) Mechanical Brake - Consistent Braking Performance In Any Condition - Easy Brake Control Hydraulic Brake
Campagnolo Super Record EPS Rear Derailleur
$995.00
Campagnolo's Super Record EPS Rear Derailleur's arresting beauty is entwined with the pinnacle in rear shifting accuracy and precision. Campagnolo uses an advanced-parallelogram design and the extremely high-quality servo motors for precise, fast shifting of up to all 11 gears from a single push of a button. Or stop on any cog and the position sensor makes micro-adjustments to ensure perfect alignment. And this top-tier Italian bike jewelry is constructed from carbon and cold-forged aluminum to create an ultra strong and extremely light derailleur. Plus, the pulleys roll on super-efficient ceramic bearings and are made from a special rubber that renders the drivetrain virtually silent.
Shimano Dura-Ace R9180 TT/Triathalon Hydraulic Disc Brake Dual Control Lever
$438.99 - $987.99
TT/Triathlon Hydraulic Disc Brake Dual Control Lever (2x11-speed). Features - Optimum power transmitted with grip firmly - Switch button integrated inside without hand release - Intuitive shifting control - Single button on each side of the shift lever only works with Synchro Shift - Each switch available with multi-shift on/off - More control and confidence in race condition - Optimally balanced hydraulic brake system for racing - Customizable the function to fit in rider's riding style - E-TUBE project - Clean cockpit area - Integrated E-TUBE cable and internal brake cable routing - New cable junction (EW-RS910/911, EW-JC130) available to integrated with bike frame
SRAM XX1 Eagle Quarq Power Meter Boost 148mm Crank Spider Assembly
$972.99
SRAM's power meter technology is reliable, accurate and easy to use. Now available as a spider by itself as an easy upgrade for existing cranks. The Dzero series offers improved data transfer and frame fit compatibility. - Fits 8-Bolt interface Quarq XX1 Power Meters (8-Bolt used since Aug '14) - Measures power for both legs with +/- 1.5% accuracy - Dual Bluetooth lowenergy and ANT+ wireless data transfer - AxCad system provides no-magnet cadence data - Free firmware updates with the QALVIN APP - Boost 148 compatible
FSA K-Force Light ABS BB386EVO Crankset
$939.99
The FSA K-Force Light ABS BB386EVO road crankset features hollow carbon fiber arms for incredible stiffness and minimal weight. The adaptable BB386EVO 30mm spindle will fit a wide variety of frames and a broad range of BB standards. Using FSA’s Asymmetric Bolt Standard, with four bolts for maximum power transfer, the K-Force Light is extremely efficient. And, the unidirectional carbon finish, updated graphics, and concealed chainring bolts make the K-Force Light look as good as it performs. - Hollow carbon arms with UD finish - Forged AL7050 BB386EVO spindle - Cold-forged CNC chainrings - AL7075 Torx T-30 alloy chainring bolts - Fits FSA, Shimano, and SRAM 10/11s systems - Bottom brackets sold separately; BB selection will depend on frame shell interface
Campagnolo H11 Crankset
$920.00
Designed specifically for use with H11 groupsets. Full Carbon crank arms and spider are hollow for maximum stiffness and minimal weight. Utilizes USB ceramic ball bearings. Light weight hard anodized alloy chainrings and alloy chainring bolts. Utilizes Campagnolo's Ultra-Torque crank system. - Ultra-Torque axles couple together in the middle of the BB shell via a Hirth Joint that self centers the crank. This results in a very light weight and stiff system that transfers power to the pedals without power loss - Features Campagnolo X.P.S.S. (eXtreme Performance Shifting System) featuring geometrically optimized chainring teeth. Optimized when mated to a full Campagnolo drivetrain - USB ceramic bearings increase smoothness and decrease rolling resistance, weight and the need for maintenance. USB bearings are 50% smoother than standard Campagnolo bearings - Ultra-Torque system have both drive and non-drive side bearings pre-installed - Double standardized bolt circle diameter allows for use of standard, mid-compact and compact chainrings - Required for use with H11 Ergopower shift levers, the crank spider is shifted outward to adjust for 135 and 142mm hub spacing while maintaining the Q-Factor - Requires use of Ultra-Torque bottom bracket cups
Campagnolo Record Ultra-Torque Crankset
$775.00 - $900.00
Campagnolo's incredible Record Ultra-Torque Crankset sports a unique, integrated spindle that joins the two sides of the crankset together via a toothed Hirth joint in the center. Campy's ultra-smooth bottom-bracket bearings are included and fit into outboard cups (sold separately). The aesthetically striking design provides incredible stiffness, while Campagnolo's standardized BCD (145/112mm) allows for multiple chainring sizes. Plus, the Record chainrings sport special pins and plating for fast, silent shifts and long life. - Chainrings included: Yes - Drivetrain speeds: 11 - Number of chainrings: double - Spindle interface: Campagnolo Ultra-Torque
Shimano Dura-Ace Di2 Dual Control Levers
$889.99
Flawless shifting, superb ergonomics, and state of the art technology? Shimano's Dura-Ace Di2 Dual Control Levers embody all of these concepts. Utter simplicity and ease of use are the hallmarks of these shifters, with gracefully curved lever blades that offer two, easy-to-reach fingertip buttons. The shifting controls are easily accessible from either the hoods or the drops, so you'll have total control from any position on your handlebar. The E-Tube wiring harness is simple, clean, totally waterproof, and runs beneath the bar tape for a super clean look.
Shimano Dura-Ace 9150 Di2 11-Speed Dual Control Levers
$449.99 - $859.99
- More Control And Confidence In Race Conditions - Optimally Balanced Hydraulic Brake System For Racing - Dedicated Brake Lever Shape, Stroke, Contact Point, Stiffness And Dedicated Shift Paddles - Light Weight - Carbon Composite Plastic Material Of Hood - More Intuitive, Quicker Shifting Operation - More Defined Click Feeling And Ergonomic Shift Lever Position - Customizable Function To Fit Any Riding Style - Each Switch Has The Option For Multi-Shift On Or Off - E-Tube Project - Optimum Power Transmitted With Grip Firmly - Ideal Ergonomic Cover Shape With Better Thickness & Tenderness - Openable Hood Cover - Simple Set Up And Maintenance - Easy Replace Hood Cover - Openable Hood Cover - Customizable The Function To Fit In Rider'S Riding Style
Shimano Dura-Ace 9150 Di2 11-Speed Rear Derailleur
$849.99
- Ergonomic Shifting Operation Without Stress - Shimano Synchronized Shift - Low Profile Rear Derailleur Design - Shimano Shadow Rd - Race Endurance For Less Damage In Crush - Maintains Compact And Smooth Appearance - Maximum Sprocket: 30T - Minimum Sprocket: 11T - Maximum Front Difference: 16T - Total Capacity: 35T
Shimano Dura-Ace 11-Speed Hollowtech II Crankset
$599.99 - $779.99
Shimano's Dura-Ace 11-Speed Hollowtech II Crankset has set the benchmark in strength-to-weight ratios, which is why it's proven itself at the highest echelon of competition. Made of cold-forged and CNC-machined aluminum, it has hollow crankarms and a hollow large chainring. Both chainrings also feature teeth perfectly designed to assist up- and down-shifts. Perhaps most unique is the 4-arm design that maximizes strength and rigidity where your pedal stroke is strongest. The result is legendary stiffness for awesome power transfer and precision shifting you'll love.
Shimano Ultegra R8020 Hydraulic Dual Control Levers
$339.99 - $759.99
Shimano Ultegra R8020 hydraulic shift/brake levers. - Greater rider control in all conditions - Hydraulic disc brake provides the next stage of control - Small bracket size improves ergonomics - Greater reach adjust range - Quick and intuitive rear shifting operation with redesigned internal shifting unit - Model Number: ST-R8020 - Series: Ultegra - Shift Cable Casing: OT-SP41 - Shift Cable: Polymer coated - Average Weight: 550 grams/pair
Shimano Ultegra R8070 Di2/Hydraulic Dual Control Levers
$339.99 - $759.99
Shimano Ultegra ST-R8070 Di2 hydraulic disc brake dual control levers. - Intuitive shifting operation - Updated features and more defined click feeling - Clearer separation between shift buttons support quick and precise shifting while operating with thick gloves - Customizable functionality to match the rider's style - Each switch has the option for multi-shift ON or OFF - E-TUBE PROJECT - Programmable function of ST top button remote switch for third party cycle computer and shifting - Greater rider control in all conditions - Hydraulic disc brake provides the next stage of control - Small bracket size improves ergonomics - Customize each SW for multi-shift on or off per SW through E-tube project App. - Greater reach adjust range and free stroke adjuster - Lightweight race-ready materials - More quick and precise shifting while operating with thick gloves - 2x11-speed - Average Weight: 180 grams
Campagnolo Record 12x2 Speed Crankset
$740.00
The new Record 12x2 Speed crankset: a new hole-free design for the right-hand crank that optimizes aerodynamics. The new carbon fiber Record 12x2 Speed crankset with unidirectional finishing guarantees continuity with the finishing of the entire groupset, whilst maintaining the Ultra-Torque bracket system on the steel axle to ensure perfect transmission of power. The new Record 12x2 Speed crankset can be installed on any type of frame, whether or not it is being used with disc brakes because it optimizes the chain line on the frame with a rear hub flange measuring 130, 135 or 142 millimeters without affecting the Q factor that remains constant at 145.5 millimeters. The innovative design of the outer chainring ensures faster, quieter derailing owing to the contoured pin. The symmetrical design of the inner chainring teeth allows improved stability with chain crossovers. The double wheel sizing standards (112 and 145 millimeters) enable reducing the weight through greater use of carbon fiber. There are eight fixing screws for increased structural stiffness. The varying number of pins for each of the three chainring combinations (34/50, 36/52, 39/53) facilitates upshifting due to the optimized free strokes associated with each combination. The special drains on the inside of the outer chainrings optimize performance when downshifting in dead spots.
Campagnolo Super Record 12 Speed Right Lever w/Hydraulic Brake Caliper
$740.00
The new Super Record 12x2 Speed Disc Brake groupset is Campagnolo's highest expression of technology and evolution. It is geared towards riders who want to equip their bicycle with the best the market offers in terms of performance and distinctiveness. The need to improve what is already considered the benchmark means every single detail, even the most basic, is attended to. The new Super Record 12x2 Speed Disc Brake groupset is presented on the market with an innovative rear derailleur designed with 3D Embrace technology that enables the chain to maintain the highest level of traction, even on the smallest sprockets. The new front derailleur with its double connector rod system enhances the use of the 24 speeds and takes full advantage of each combination of metric development. It always finds the ideal ratio for every incline. The new Ergopower controls are even more ergonomic due to the unique shape of the levers that allow for even better operation. The new crankset with the two-by-two coupling of the arms is a step forward in stiffness, whilst keeping constant the technologies and advantages characteristic of Super Record. The new sprocket packs contain an extra sprocket and highlight the incredibly technological processing of the larger sprockets enclosed in the two triplet single-piece monolith units. The new 5.2 mm chain maintains the high Campagnolo standards, enhancing the derailings of the new Super Record drivetrain through the alignment of the pins on the external links. Last but not least, the Disc Brake technology developed by Campagnolo for the 2018 product range ensures that the Super Record groupset has the greatest braking force and modulability possible.
Campagnolo Super Record 12x2 Speed Left Lever w/Hydraulic Brake Caliper
$740.00
New mechanical Ergopower Super Record 12x2 Speed Disc Brake controls: more ergonomic, more precise, more powerful and easier to maintain. Comfort, control, speed, and responsiveness are some of the main features of a bike's controls, helping keep all situations under control. The new mechanical controls for the Ergopower Super Record 12x2 Speed Disc Brake offer an ergonomic, comfortable and safe support and grip thanks to Vari-Cushion technology, essential for those who stay on the saddle for several hours. The controls’ inner workings are a concentration of technology and experience, starting with the “one lever, one action” function, which assigns each lever a single function, helping avoid shifting errors at tired or distracting moments, and then continue with the multiple shifting option which allows up- or downshifting by up to 5 sprockets at a time thanks to the Ultra-Shift mechanism. This function allows you to maintain cadence even in case of sudden changes of incline or rhythm, with speed and ease as useful as it is surprising. Further useful features are the levers’ adjustability, which, thanks to Reach Adjustment, enable a low grip on the brake lever, helping those with smaller hands; and AMS Adjustment, which enables shifting time modulation, using the dedicated levers. The Super Record Disc Brake brake levers are engineered with a double curvature for improved grip and are lightened with two slots that are added to the one dedicated to Reach Adjustment.
SRAM XX Crankset
$669.99 - $714.99
When SRAM began developing XX, they were looking to create the lightest, most precise and technically advanced components possible, and boy have they delivered! The XX Crankset boasts carbon/aluminum arms to keep the weight incredibly low and boost stiffness to stratospheric levels. The chainrings are no small feat of engineering, either. They’re painstakingly cut from solid aluminum blocks to eliminate power-robbing flex and they’re exquisitely ramped and pinned to provide lightning-quick, impressively crisp gear changes. What’s more, the XX is available in two widths so you can get the perfect fit and maximize efficiency.
Campagnolo Super Record 11-Speed Cassette
$505.00 - $710.00
For flawless shifting and maximum power transfer, Campagnolo brings you the Super Record 11-Speed Cassette. Its largest 6 cogs are constructed from titanium to save weight, while the other 5 are made of nickel-plated steel for durability. The cogs are mounted on a light and rigid aluminum carrier, and the cassette is secured to the rear wheel with a feathery aluminum lockring.
Campagnolo H11 Left Ergopower Control Lever w/Hydraulic Brake Caliper
$700.00
Integrated brake/shift lever with hydraulic line and flat mount disc caliper attached. Shift lever features 11-Speed Ultra-Shift shifting providing the ability to up-shift five sprockets and down three. Composite lever body with carbon brake lever. - Brakes are shipped dry, and require bleeding after installation. Compatible with both Campagnolo and Magura bleed fittings - Requires the use of H11 crankset and MY15 and newer Chorus, Record or Super Record derailleurs - Adjustable reach and lever throw - Ultra-Shift Ergonomics design makes it possible to utilize three different hand positions on the levers - Vari-Cushion silicon hoods provide variable cushioning zones to optimize comfort while grooved areas drain water away improving grip - Double curvature brake lever allows for engagement and modulation from any hand position - Includes genuine Campagnolo shift cables and housing
Campagnolo H11 Right Ergopower Control Lever w/Hydraulic Brake Caliper
$700.00
Integrated brake/shift lever with hydraulic line and flat mount disc caliper attached. Shift lever features 11-Speed Ultra-Shift shifting providing the ability to up shift 5 sprockets and down 3. Composite lever body with carbon brake lever. - Brakes are shipped dry, and require bleeding after installation. Compatible with both Campagnolo and Magura bleed fittings - Requires the use of H11 crankset and MY15 and newer Chorus, Record or Super Record derailleurs - Adjustable reach and lever throw - Ultra-Shift Ergonomics design makes it possible to utilize three different hand positions on the levers - Vari-Cushion silicon hoods provide variable cushioning zones to optimize comfort while grooved areas drain water away improving grip - Double curvature brake lever allows for engagement and modulation from any hand position - Includes genuine Campagnolo shift cables and housing
Campagnolo Super Record EPS ErgoPower Shift/Brake Levers
$700.00
Take your shifting to the next level with Campagnolo's Super Record EPS ErgoPower Levers. These Italian beauties offer the ultimate in braking and perfect electronic shifting function. The rear lever's unique design allows for up to ten simultaneous shifts in either direction with the simple hold of a button. Plus, you can easily shift the front chainring flawlessly even under load. You'll also love the comfortable, ergonomic design that makes the levers and hoods fit like a glove. Plus, Campagnolo's advanced carbon construction lets these remarkable levers live up to the vaulted Super Record moniker.
Specialized Power Cranks - Shimano Ultegra Upgrade Kit
$699.99 - $700.00
Whether you're looking to take your training to the next level or you simply want a better way to measure energy expenditure, a power meter is your best bet. And the Power Cranks Ultegra Upgrade Kit are no exception. With our lightweight power sensors on a Shimano Ultegra crankarm, it's the perfect way to enter the power meter game. The development of Power Cranks began with our Human Performance Team looking at riders in realistic scenarios on the bike. Historically, power meters have been validated by two different methods—one is by measuring the produced torque by applying a static, linear load to a crankarm or chainring, while the second uses a power generating motor to pedal the bike. Well, cycling is neither static nor linear, and humans apply power much differently than a machine. So, we found that neither of these methods answers the 'real-world' accuracy question. To get the best test for accuracy, in all types of riding scenarios, we built our own cycling treadmill, the WinMill, to measure power output to a known truth. This new benchmark lets us evaluate accuracy under all riding conditions—seated versus standing, various power and cadence levels, different weights, and a myriad of gear. This data acquisition process is our gold-standard for testing power meters, and through our testing and external validation from the Locomotion Lab in Boulder, Colorado, Power Cranks have been proven to have the highest accuracy in real-world scenarios (+/- 1.5%). The Power Cranks are also easy to live with, with class-leading temperature compensation firmware and waterproof enclosures. Calibration is only required during seasonal-type fluctuations in temperature, and the included wrench makes battery swaps a breeze. - +/- 1.5% real-world accuracy tested on the WinMill and validated by the Locomotion Lab in Boulder, CO. - Works with ANT+ and Bluetooth® devices. - Easy set-up and diagnostics with the Specialized Power app. (iOS and Android versions available). - Shimano 8000 generation Ultegra left-side power measurement. - Right crankarm and spider NOT included. - Available in 170-175mm crankarm lengths.
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