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Parts

(3327 matches)
DVO Emerald Tapered 20-D 27.5
$1,895.00
- Air sprung with adjustable negative coil spring - Twin Tube open bath cartridge damper with Bottom Loader compression unit - Rebound, high and low speed compression external adjustability - Threadless aluminum steerer with 42mm 7000 series aluminum upper tubes - Carbon Torsion Arch increases stiffness by 25% - 36mm lower legs with forged magnesium 20x110mm dropouts - 74mm Post-Mount, 203mm disc brake only
RockShox RS-1 Suspension Fork
$1,865.00
25 years after the original RS-1, the fork that revolutionized mountain biking, RockShox does it again. A chassis design never seen before, which integrates the fork's steerer tube, crown and legs into a single carbon mainframe. The all-new Accelerator Damper, which combines incredible small bump performance with an ultra-efficient lockout. And Predictive Steering, a reimagined interface between hub and dropouts which enabled us to create an inverted fork light enough for XC racing and stiff enough for trail riding. - TRAVEL: 80/100/120mm - WHEELS: 27.5-inch, 29-inch - AXLE TO CROWN: 487mm - 27.5-inch/100mm travel, 507mm - 27.5-inch/120mm travel, 486mm - 29-inch/80mm travel, 506mm - 29-inch/100mm travel, 526mm - 29-inch/120mm travel - WEIGHT: 1646g - 27.5-inch, 1666g - 29-inch - DAMPING: Accelerator with Dig Valve and Rapid Recovery rebound tune - AVAILABLE SPRINGS: Solo Air - ADJUSTMENTS: XLoc remote (lockout and floodgate) and Beginning Stroke rebound - STEERER OPTIONS: Tapered carbon - CROWN: Carbon - UPPER TUBES: 32mm aluminum, Fast Black - LOWERS: Carbon - MAXIMUM ROTOR SIZE: 200mm - COLOR OPTIONS: Diffusion Black, Gloss Black, Gloss White - REMOTES: XLoc Sprint, XLoc Full Sprint - OTHER: Brake Type: Disc, Axle: Predictive Steering w/Maxle Ultimate (hub sold separately), Fork Offset: 42mm (27.5-inch), 46mm/51mm (29-inch)
RockShox RS1 Fork (27.5-inch)
$1,865.00
Twenty-five years after the original RS-1, the fork that revolutionized mountain biking, RockShox does it again. The innovative chassis design integrates the fork's steerer tube, crown, and legs into a single carbon mainframe for incredible stiffness. Combining fine-tuned small bump performance with an ultra-efficient lockout for extreme performance, the Accelerator Damper keeps you riding high in the plushest part of the travel. And Predictive Steering, a re-imagined interface between hub and dropouts, enables an inverted fork light enough for XC racing and stiff enough for trail riding.
DVO Emerald Tapered 20-D 26
$1,775.00
- Air sprung with adjustable negative coil spring - Twin Tube open bath cartridge damper with Bottom Loader compression unit - Rebound, high and low speed compression external adjustability - Threadless aluminum steerer with 42mm 7000 series aluminum upper tubes - Carbon Torsion Arch increases stiffness by 25% - 36mm lower legs with forged magnesium 20x110mm dropouts - 74mm Post-Mount, 203mm disc brake only
SRAM RED eTAP Electric Road Kit
$1,742.99
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
RockShox BoXXer World Cup (26-inch)
$1,700.00
Be faster. RockShox's BoXXer has been on the downhill circuit for nearly two decades years and has amassed countless World Cup victories. With a massive 200mm of linear, air-sprung travel and an unbelievable weight of just 5.7 pounds, this thing devours every course with smooth, stylish speed. This race-bred beauty features RockShox's Charger DH damper so you can dial-in the feel to your preferences and even the day's course conditions. For a plush ride, RockShox's Solo Air system uses just one valve to adjust both positive and negative air chambers to retain the compliance of a dual-air system. Plus, RockShox's 20mm Maxle Lite DH through-axle combines with big 35mm stanchions to give you surgical steering precision and supreme stiffness for the tightest lines and fastest cornering.
SRAM RED eTAP Electric Aero Kit
$1,659.00
Step up to the next generation in shifting with SRAM's wireless RED eTAP electric aero drivetrain kit. The aero kit includes Blip shifters, derailleurs, battery charger and USB stick. Brake levers not included. Each kit contains: - 4x SRAM eTAP 650mm Blip remote shifter buttons - SRAM eTAP Blip Box - SRAM RED eTAP wireless front and rear derailleurs - SRAM eTAP batteries - Battery charger - USB stick - Quick-start guide
Manitou Dorado Pro Fork
$1,600.00
Manitou's Dorado Pro is an engineering masterpiece. 7050 legs, inverted construction, dual-chamber air spring, TPC+ damping (with independent high- and low-speed compression), hydraulic bottom-out and top-out, and Manitou’s patented HexLock 20mm thru-axle add up to the most advanced downhill fork ever. - Weight Lb / grams: 6.55 / 2973.7 - Travel: 180, 203mm Internally Adj. (29'er 150, 175mm) - Spring: Air - Spring Rate: n/a - Bottom Out: Hydraulic and Rubber Bumper - Steerer: 1 1/8" Aluminum - Crown: Forged Hollow-Oval Bore - Crown Finish: Black Ano Polished - Offset: 49.55 - Compression Damping: TPC+ - Rebound Damping: Adjustable TPC - Adjustments: Air Compression (High Speed and TPC+) Rebound - Leg Diameter: 36mm - Leg Material: 7050 Aluminum - Wheel Size: 26" / 27.5" / 29" - Brake: Post Mount - Axle: 20mm Hex TA - Crown to Axle: 567 / 591(26") 582/606(27.5") 567/591(29") - Axle: 9mm, 20mm, QR15 - Crown to Axle: 27.5" - 516.5/536.5
Pioneer Shimano Dura Ace 9000 Crankset Power Meter
$1,499.99
Pioneer's full crankset power meters are simply some of the best power-monitoring systems on the planet. The Pioneer Shimano Dura Ace 9000 crankset is your chance to ride the same technology used by the world's best riders, ensconced in one of the most aesthetically pleasing cranksets ever created. Pioneer's created the first, and only, power meter that measures power output and pedaling stroke efficiency for each individual leg, in real time, allowing you to analyze and adjust your technique on the fly. At the heart of the Pioneer Power Meter System are two streamlined strain gauge monitors that detect the slightest tangent and radial-force direction as power is applied to the crank arms. This proprietary system detects the amount and direction of force at 12 different points in each pedaling stroke for each leg, letting you fine-tune your pedaling to find race-winning form. With advanced technology accurate to +/- 2%, ANT+ transmitting, and active temperature compensation, the Pioneer power meter is perfect for any cyclist. Additionally, installation is fast, simple, and clean with zero wires, magnets, or zip ties. - Standard: 53/39 - Mid-Compact: 52/36 - Compact: 50/34
Pioneer Shimano Ultegra 6800 Crankset Power Meter
$1,299.99
Pioneer's full crankset power meters are simply some of the best power-monitoring systems on the planet, and Pioneer's Shimano Ultegra 6800 crankset is your chance to ride the same technology used by the world's best riders. Pioneer's created the first, and only, power meter that measures power output and pedaling stroke efficiency for each individual leg, in real time, so you can analyze and adjust your technique on the fly. At the heart of Pioneer's Power Meter System are two streamlined strain gauge monitors that can detect the slightest tangent and radial force direction as power's applied to the crank arms. This proprietary system detects the amount and direction of force at 12 different points in each pedaling stroke for each leg, allowing you to fine-tune your pedaling to find race-winning form. With advanced technology accurate to +/- 2%, ANT+ transmitting, active temperature compensation, Pioneer's power meter is perfect for any cyclist. Additionally, installation is fast, simple, and clean with zero wires, magnets, or zip ties. - Standard: 53/39 - Mid-Compact: 52/36 - Compact: 50/34
RockShox BoXXer Team (26-inch)
$1,275.00
For nearly two decades, the RockShox BoXXer has been gracing podiums at downhill World Cup races and leading the charge at freeride events. With a massive 200mm of linear, coil-sprung travel and an impressive weight of just 6.4 pounds, you'll devour every course with smooth, stylish speed. To make that happen, this fork features the groundbreaking Charger damper for excellent mid-stroke support and a bottomless feel. The BoXXer also has RockShox's 20mm Maxle Lite DH through-axle and big 35mm Fast Black stanchions. Combined, this chassis has the stiffness you need for surgical steering precision to hold the tightest lines on any track.
Manitou Dorado Expert Fork
$1,200.00
Manitou's Dorado Expert is an engineering masterpiece. 7050 legs, inverted construction, dual-chamber air spring, TPC+ damping (with independent high- and low-speed compression), hydraulic bottom-out and top-out, and Manitou’s patented HexLock 20mm thru-axle add up to the most advanced downhill fork ever. - Weight Lb / grams: 6.82 / 3096 - Travel: 180, 203mm Internally Adj. (29'er 150, 175mm) - Spring: Air - Spring Rate: n/a - Bottom Out: Hydraulic and Rubber Bumper - Steerer: 1 1/8" Aluminum - Crown: Forged Hollow Bore - Crown Finish: Matte Ano Polished - Offset: 49.55 - Compression Damping: TPC+ - Rebound Damping: Adjustable TPC - Adjustments: Air Compression (High Speed and TPC+), Rebound - Leg Diameter: 36mm - Leg Material: Aluminum - Wheel Size: 26" / 27.5" / 29" - Brake: Post Mount - Axle: 20mm Hex TA - Crown to Axle: 567 / 591(26") 582/606(27.5") 567/591(29") - Colors: Black Ano
Quarq DFour Power Meter Crankset
$1,179.00
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 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 Riken R 130 BCD Power Meter Crankset
$1,149.00
Consistency in training leads to better results, which is why using a consistently accurate and reliable power meter is vital. Quarq's Active Temperature Compensation, which is calibrated with over 10,000 data points, makes their ELSA R accurate to within 1.5%. Carbon crankarms deliver the power to the road and keep the Riken light on the climbs. ANT+ technology lets you hook up your desired compatible head unit (sold separately), the LED indicator flashes when the power meter is on, and the single, easily replaced CR2032 battery lasts for up to 300 hours of ride time. - Compatible with 10/11-speed SRAM, Shimano (10-speed only) Rotor, FSA, Praxis, WickWerks, and other chainrings - Chainrings and bottom bracket are sold separately - 130 BCD
SRAM XX1 Eagle Quarq Power Meter Crankset
$1,129.00
The SRAM XX1 Eagle Power Meter unites Quarq's DZero power meter platform with carbon tuned crank arms for robust, intuitive power measurement in the lightest ever chassis. The DZero platform embodies 10 years of Quarq's technology advances and adds new features such as dual Bluetooth low energy and ANT+ wireless data transfer, and the Qalvin BLE app. The companion X-SYNC 2 chainrings are designed specifically for Eagle chains and drivetrains. - BB Included: No - Chainring BCD: 104 - Chainrings sold separately
Quarq DZero Carbon Power Meter Crankset
$1,079.00
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
Rotor InPower 3D+ Power Meter Crankset
$1,079.00
Manufactured in Spain from 7055 aluminum through state-of-the-art CNC-machining, Rotor's INpower 3D+ is a single-leg power meter crankset that reports metrics through user-friendly software. Seamlessly integrated inside a compact crank axle, the INpower 3D+ 110 BCD is protected from shocks, crashes, and outside contaminants, plus it allows you to maintain your bike’s sleek, elegant aesthetics. Equipped with the MAS spider for greater tuning options when used with Rotor OCP rings. - Equipped with 4 strain gauges in the spindle that reports power, cadence, Torque 360, OCA, left side pedal smoothness and left side torque effectiveness - Transmits wirelessly via ANT+ 2.4 - 100% machined CNC, Al 7055 T6
SRAM RED Quarq Power Meter Crankset
$1,079.00
The crankset is the heart of your bicycle and where you’ll find the SRAM RED Quarq power meter. The sole job of the crankset is to convert the effort from both legs to forward motion. It is the perfect place to measure power. This power meter works for every discipline: Road, triathlon, time trial, and cyclo-cross. The chainrings are replaceable should your bike, discipline, or ability change. - A direct force power meter that measures total power output from both legs with +/-1.5% accuracy - Works for every discipline: Road, triathlon, time trial, and cyclo-cross - No compromises on materials, shifting, wheels, or pedal choice - Proven by pro teams and athletes throughout the world – Cobbled Classics, Giro d’Italia, Tour de France, Vuelta a España, World Championships - Number 1 at the Ironman World Championship for the last three years - Uses a hidden bolt to mount the chainrings – compatible SRAM chainrings ensure the derailment pin lines up behind the crank arm - 10K – programmed with over 10,000 data points to eliminate temperature effects on power measurement - AxCad – A multi-axis accelerometer switches the power meter on and measures cadence, simplifying installation and operation - Breakthrough Materials – Exogram hollow carbon fiber crank arms – the lightest, strongest crank arms SRAM makes – minimize weight and maximize speed [ELSA RS, ELSA R and SRAM RED] - Easy to use (and reuse) – LED indicator and visible ANT+ ID - The replaceable CR2032 battery never leaves you without power - Manual and automatic zeroing make it truly set and forget - Built to Last – IPX7 waterproof rating, 2-year warranty, free firmware updates, and acclaimed international support - Moves with you from bike to bike - With Quarq's free Qalvin app – available for Windows, Mac, iOS and Android – you can set the zero offset, check battery voltage, run diagnostics, and perform firmware updates for free Arm Material: Carbon arms, Machined alloy spider Weight: 778 grams (GXP 172.5mm 53x39 BB not included) * Chainrings and BB sold separately
RockShox Lyrik RCT3 Solo Air (27.5-inch)
$1,030.00
Sure, RockShox's Lyrik RCT3 Solo Air can go up, but when the trail tilts down and things get hectic, this thing comes alive. With 160-180mm of travel, this do-it-all fork boasts their fluid Charger damping that smooths out big hits and provides consistent damping from the top to the bottom of the trail. It also lets you perfectly tune your low-speed compression for techy, square-edged courses to pumpy, jump-filled trails and everything in between. For more all-mountain prowess, the Solo Air spring also reduces weight. The Lyrik utilizes RockShox's Maxle Ultimate thru-axle for supreme stiffness, surgical steering precision, and impressively low weight.
RockShox Lyrik RCT3 Solo Air (29-inch)
$1,030.00
Sure, RockShox's Lyrik RCT3 Solo Air can go up, but when the trail tilts down and things get hectic, this thing comes alive. With 150-160mm of travel, this do-it-all fork boasts their fluid Charger damping that smooths out big hits and provides consistent damping from the top to the bottom of the trail. It also lets you perfectly tune your low-speed compression for techy, square-edged courses to pumpy, jump-filled trails and everything in between. For more all-mountain prowess, the Solo Air spring also reduces weight. The Lyrik utilizes RockShox's Maxle Ultimate thru-axle for supreme stiffness, surgical steering precision, and impressively low weight.
RockShox Pike RCT3 Solo Air (27.5-inch)
$1,030.00
RockShox's Pike RCT3 Solo Air is the ultimate fork for all-mountain and enduro riding. Burly 35mm stanchions, magnesium lowers, and a lightweight hollow forged aluminum crown deliver supreme stiffness to rip down the toughest enduro courses. When the bumps come hard and fast, RockShox's Charger damper keeps the fork high in the travel to maintain proper bike geometry, all while soaking up everything from flowy dirt ribbons to crazy rock-strewn goat paths. The RCT3 three-position switch changes between full travel, lockout and threshold modes so you can save your legs on a transition stage and open it up to pin the next timed downhill.
RockShox Pike RCT3 Solo Air (27.5-inch, Boost)
$1,030.00
RockShox's Pike RCT3 Solo Air is the ultimate fork for all-mountain and enduro riding. Burly 35mm stanchions, magnesium lowers, and a lightweight hollow forged aluminum crown deliver supreme stiffness to rip down the toughest enduro courses. When the bumps come hard and fast, RockShox's Charger damper keeps the fork high in the travel to maintain proper bike geometry, all while soaking up everything from flowy dirt ribbons to crazy rock-strewn goat paths. The RCT3 three-position switch changes between full travel, lockout and threshold modes so you can save your legs on a transition stage and open it up to pin the next timed downhill.
RockShox Pike RCT3 Solo Air (29-inch)
$1,030.00
RockShox's Pike RCT3 Solo Air is the ultimate fork for all-mountain and enduro riding. Burly 35mm stanchions, magnesium lowers, and a lightweight hollow forged aluminum crown deliver supreme stiffness to rip down the toughest enduro courses. When the bumps come hard and fast, RockShox's Charger damper keeps the fork high in the travel to maintain proper bike geometry, all while soaking up everything from flowy dirt ribbons to crazy rock-strewn goat paths. The RCT3 three-position switch changes between full travel, lockout and threshold modes so you can save your legs on a transition stage and open it up to pin the next timed downhill.
PowerTap P1 Pedals
$999.99
These aren't ordinary pedals. The P1 pedal is a simple, intelligent and uncompromising design that provides the same proven PowerTap accuracy and reliability. The simple one-piece design easily mounts to any crank and does not require calibration nor installation angle setting, providing a true “plug-and-play” experience. The P1 also features dual band ANT+ and Bluetooth SMART for compatibility with a multitude of head units and smart devices. Plus, the independent measurement opens the possibility for a new set of pedaling metrics previously unavailable to help give you the ultimate competitive edge.
Manitou Magnum Pro Plus
$899.99
The Plus size category is brand new, and Manitou has already improved it. That’s because their Magnum fork is standard equipment on debut Plus rides from some of the world’s most accomplished manufacturers. The Magnum is specifically tuned to maximize the rolling inertia of the larger tire patch. Translated, it means Magnum will make your Plus riding experience smooth and predictable. Pioneering a dynamic front suspension in this category is just one more, big fat example of Manitou's commitment to excellence. - Clearance for up 3.3-inch-wide tires - 120mm version internally adjustable to 140mm travel with included spacers, while 100mm version is internally adjustable to - 80mm with included spacers - Dorado air spring system - 1.5” Tapered steerer - 48mm (27.5") / 51mm (29") offset - Post Mount 180mm brakes - 34mm stanchions, alloy steerer - QR15 axle - Requires a 15x110mm hub
RockShox Pike DJ Solo Air (26-inch)
$885.00
Jumps are getting bigger, tricks are evolving further, and the slopestyle and dirt jumping crowd needs a fork that facilitates this progression. Enter RockShox's Pike DJ: twin brother to the award-winning, trail-crushing Pike. With the stout 35mm chassis, it is light enough to boost higher, and stiff enough to shred berms harder. It's available in 100 and 140mm travel versions so you can get the fork that fits your flow and your bike's geometry. The custom-tuned Charger damper stands up on jump faces and the DJ-specific Solo Air system provides heaps of bottom-out progression to help butter the landings. It's everything you love in a Pike—cleared for the biggest take offs.
Manitou Mattoc Pro 2 Fork
$799.00
Mattoc Pro 2 is the result of three years of racing and test feedback from riders all over the world. Refinements to both chassis and air spring have brought Manitou's award-winning all-mountain fork to a new benchmark in racing performance, while the standard-issue IVA (Incremental Volume Adjust) system adds a new element of adjustability. Incorporating the same dual-chamber, self-regulating air spring and Hydraulic Bottom-out system as found in Manitou's race-pedigree Dorado, the Mattoc Pro 2 is largely regarded as the ‘downhiller’s enduro fork’. - Weight Lb / grams: 1877g - Travel: 160 - Spring: DH Air (Dorado) - Spring Rate: n/a - Bottom Out: Adjustable HBO and Rubber Bumper - Steerer: 1.5” Taper Only - Crown: Forged Deep Bore Hollow - Crown Finish: Color Match - Offset: 44 mm - Compression Damping: TPC Technology MC2-In Leg - Rebound Damping: Adjustable TPC Cartridge - Adjustments: Air Compression (High Speed and TPC+), Hydraulic Bottom Out Rebound - Leg Diameter: 34mm - Leg Material: 7050 Butted Aluminum - Wheel Size: 27.5" - Brake Post Mount: 180mm - Axle: Hexlock SL - Crown to Axle: 555 - Colors: Matte Red, Matte Black, Gloss Black (OEM only), Gloss White
Campagnolo Super Record EPS Braze-On Front Derailleur
$795.00
Campagnolo's Super Record EPS Braze-On Front Derailleur delivers electronic precision to your front shifts. Hammer into the big ring and surge forward with a mere touch of a button, under heavy load or out of the saddle it's still as smooth as a dream. An aluminum internal cage plate and external carbon cage is powered by a servo motor to provide the incredibly quick shifting. It's versatile too, working with both standard and compact cranksets and auto-trimming to eliminate chain rub. - Drivetrain speeds: 11 - Derailleur capacity: 16T - Max ring (teeth): 55T - Double or triple: Double - Waterproof to 1 meter for 30 minutes (IP67 rated) - Weight: 127g
Campagnolo Super Record Carbon Crankset
$790.00
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 DFour Power Meter Spider
$779.00
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 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 Spider represents the state of the art in power meter technology - The DFour Spider is a bolt-on upgrade for Shimano’s 11-speed Dura-Ace 9000, Ultegra 6800 and 105 5800 chainrings. - Bluetooth low energy technology and ANT+ wireless data transfer. - 10K Temperature Compensation. - Battery - CR2032, 200-hour battery life, change without tools. - OmniCal - swap chainrings without affecting accuracy. - IPX7 waterproof rating. - Accuracy within 1.5%
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