Now available as a spider by itself as an easy upgrade for existing cranks. The Dfour model offers enhanced data transfer & frame fit compatibility. Compatible with these non-power meter cranks: Quarq Prime & SRAM Red BB386EVO (not compatible with Quarq Elsa R cranks). Compatible with these power meter cranks: Quarq Elsa RS, Quarq Riken Al, Quarq Riken R (produced July 2015 & later), SRAM XX1, 2016 & later SRAM Red power meter cranks (Red e Tap graphics). ...

This power meter spider features a CNC-machined aluminium construction, which makes it more than capable of withstanding all the intensity that's associated with long days in the saddle. Whether you're training for a road, triathlon, time trial or cyclocross event, this spider is developed to boost your training session with precise power measurement (dual-sided), cadence, torque & pedal stroke uniformity. Developed over the course of 10 years, this power meter spider has innovative features such as wireless two-channel data transmission via Bluetooth Low Energy (LE) & ANT+ or the Qalvin BLE app. If you already have a QUARQ power meter with an 8-bolt interface as a connection between spider & crank, you can upgrade it to DZero technology with the DFour 91 power meter spider. Item Top Features Continued: Power Source: CR2032 lithium battery Battery Life: Approx. 200 hours, tool-free battery change Data Collected: Power (dual-sided), cadence, torque, pedal stroke uniformity Waterproof: IPX7 Data Transfer: ANT+, Bluetooth Automatic or manual zero setting LED status display Standby after 10 minutes of inactivity, automatic restart by crank rotation No cadence magnet required thanks to Ax Cad (multi-axis acceleration sensor) 10K temperature compensation (programmed with over 10, 000 data points) Easy chainring change without recalibration Qalvin BLE app: installation, firmware updates, reset, battery status, system diagnostics Compatibility: Cranks:
- QUARQ ELSA RS (as of August 2014)
- QUARQ RIKEN AL (as of April 2015)
- QUARQ Prime Power Ready cranks (as of March 2016)
- QUARQ RIKEN R (as of July 2015)
- QUARQ DFour 91 power meters (as of 2017/18)
- SRAM Red Power Ready cranks (as of March 2016)
- SRAM Red BB386EVO standard cranks (as of March 2016)
- SRAM Red power meters (e Tap graphics as of January 2016)
- SRAM XX1 power meters (as of August 2014)
- not for QUARQ ELSA R Chainrings:
- for Shimano Dura Ace R9100 chainrings
- also compatible with Ultegra R8000 chainrings Technologies: QUARQ Operating Principle: The crankset forms the heart of your bike. Their only task is to convert the force of both legs into forward motion
- the perfect place to measure performance. Power meters calculate power by measuring torque (pedal force) & angular velocity (cadence). Power = torque x cadence. When you pedal, all parts of the bicycle drivetrain shift (bend) slightly under the load. Power meters are designed using FE analysis so that these displacements take place in a very controlled manner & at specific locations in relation to the applied load. Strain gauges are used to measure this displacement & thus calculate the applied torque. Reed switches are used to calculate the cadence. DZero: DZero is QUARQ's next generation power meter, named after the DZero Experiment, one of the most accurate & innovative scientific projects to discover subatomic particles. With a revised measurement loop, optimised strain gauge design, increased accuracy & the features of the Qualvin app, DZero represents the state of the art in power meter technology. You can choose between Bluetooth LE & ANT+ technology for data transfer. A simplified product line makes it easier for you to find the right power meter for your bike. Compatibility has been extended to include Boost 148 (52 mm chainline) for Mountain bikes & BB386EVO bottom brackets. Older QUARQ power meters can be upgraded to DZero technology with the DFour 91 power meter spider, provided they have the 8-bolt interface as a connection between the crank & the spider. Omni Cal: The power measurement depends on the choice of the right chainring. Change from a Road to a Time Trial chainring without sacrificing accuracy. No recalibration necessary. Power Balance: Shows the ratio of the generated power in the right drive stroke (first half) compared to the left drive stroke (second half). This means that you can pedal evenly with a 360 degree rotation.












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SRAM Quick View Computer Mount Adaptor: The new SRAM Quick View Computer Mount Adaptor features a slide interface on one side, & a quarter-turn twist on the other, to conveniently attach a Garmin Edge&174; 605 or 705 computer to any SRAM Quick View Computer Mount Easy to install, light, secure & durable. The all-new SRAM Quickview Adaptor makes slick work of attaching your sliding head unit interface to any of SRAMs quarter-turn Quickview Mounts. Weight 8g Use with Edge 605 & 705 ...

SRAM Quick View Garmin Computer Mount: The SRAM Quick View Computer Mounts features an all-new design optimized for off-road or road use while retaining the simple & secure 1/4 turn twist mount interface. An all-new clamp design splits the clamp with top access to the pinch bolt (T25 stainless). For MTB the mounting platform positions the cycling computer up & directly behind the MTB bar & stem face plate to better protect the computer when riding on rough terrain. For road the mounting platform positions it to the front of the stem, or flip it to position the computer before the bar for Cyclo Cross use. Works great with your Quarq power meter! Weight: 22g MTB / 20g Road
Colours: Black

Material: Nylon composite, Stainless bolt Torx T25 Compatibility: Compatible with computers with 1/4 turn twist lock interface & 31.8mm bars Compatible with Garmin 200, 500, 800
- &188; turn twist lock Sturdy, Slip-free, Vibration-free



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An all-new clamp design splits the clamp with top access to the pinch bolt (T25 stainless). For MTB the mounting platform positions the cycling computer up & directly behind the MTB bar & stem face plate to better protect the computer when riding on rough terrain. For road the mounting platform positions it to the front of the stem, or flip it to position the computer before the bar for Cyclo Cross use. Works great with your Quarq power meter! ...

Created for Time Trial riders & Triathletes, the R2C TT 10 Speed Shifter uses the same technology utilised by Formula One drivers to make sure every change of pace is made as effectively & efficiently as possible. Making the most of SRAM's R2C (Return to Centre) design, the shifter fits on to your bar end, meaning no change in h&-shape is required & your aerodynamics are not impacted. Once pulled, the shifter automatically returns to its starting position, minimising effort, energy & concentration loss to keep you honed in on your target. Built from unidirectional carbon fibre, the narrow shifting blade fits brilliantly between your thumb & forefinger for a comfortable shifting position, while a titanium bolt inside enables you to adjust its initial position to within 40 degrees range for a 100% customised fit. Precisely indexed, the front shifter holds two trim positions to offer the optimum chainline for the most efficient & smooth gear change around. ...

SRAM R2C TT 10 Speed Time Trial/ Triathlon Shifter Set: These return to centre TT Shifters allow the rider to keep their hands in the most aerodynamic position as the shifter returns automatically to its stating position after each shift. The R2C Shifter can be set up at any angle the rider wishes, be it most aero or most ergonomic, regardless of the angle of the TT Bar extensions. Lance Armstrong has been the prime tester of the R2C Shifters & now they can be seen on Alberto Contadors, Andy & Frank Schlecks & Linus Gerdemanns TT rigs as well as that of the reigning Olympic Time Trial Champion Fabian Cancellara. Ergonomic shifting Carbon shifter blade, titanium bolts Multiple angle setup (40 degree) Will only work with SRAM mechs Weight: 175g ...

The R2C Shifter can be set up at any angle the rider wishes, be it most aero or most ergonomic, regardless of the angle of the TT Bar extensions. Lance Armstrong has been the prime tester of the R2C Shifters & now they can be seen on Alberto Contadors, Andy & Frank Schlecks & Linus Gerdemanns TT rigs as well as that of the reigning Olympic Time Trial Champion Fabian Cancellara. ...

Designed to distract as little as possible, this set of lightweight shifters are shaped to sit perfectly between your thumb & index finger & are indexed for accurate & effortless front & rear gear changes. The perfect blades for time trial specialists & triathletes, the position & ease of use of the SRAM R2C TT 11 Speed Shifter Set reduces concentration loss & effort as you work up to your top speeds. Made from unidirectional carbon, the narrow shifting blade can be comfortably manoeuvred, spring back to its central position after every switch for peak aerodynamic performance. A titanium bolt on the inside of the shifter means that you can initially set it to your optimum angle, with a 40-degree adjustment range to suit the type of bar and/or bar extensions of your choice. Trim positions at the front of each shifter also give a fantastic chain line, making the SRAM R2C TT 11 Speed an innovative & efficient shifter set, guaranteed to help shave seconds off your next run. ...

Ideal for all kinds of off-road riding, SRAM's Racing Grips offer a tacky feel with a slight amount of flex, helping you to maintain grip as your quickly changing direction & diving into corners at speed. ...