Item # PAP000Q
PowerTap C1 Chainrings with Sensor $699.99
PowerTap is back.
Over the last few years, PowerTap has quietly flown under the radar as other companies have made various forays and advancements in the power meter sector, but the brand was far from dormant during that time. The engineers over in Madison were busy putting the finishing touches on the brand new C1 Chainrings and Sensors, which demonstrate that PowerTap is still very much a relevant member of the market. Rather than clinging to its hub-based power measurement and proclaiming it as the only power standard worth paying attention to, PowerTap now offers a chainring and pedal option. Based on the C1 Chainrings' simple setup, accessible price tag, and accuracy, we'd predict it'll become an important new player in the market.
The Chainrings are manufactured by FSA as a one-piece design in three different teeth configurations, but a caveat to consider is that the chainrings are only compatible with five-bolt 110mm bolt circle diameters, so they won't work with every crankset on the market right now. We'd imagine this will change in the future as PowerTap gets through the C1's initial introduction then refines its design to offer more options, and it's a small price to pay for the affordability of the system if you're already using compatible crank arms.
Once mounted, the chainring divides the stroke in half to measure left and right-side power, a feature not commonly included on power meters in this price range, and it uses motion-based electronics to keep the system from adding bulk to your frame with multiple sensors. While you're pedaling, a built-in accelerometer records cadence as well. According to PowerTap, the system calculates power with the brand's standard +/-1.5% accuracy, and it auto-zeroes as soon as pedaling stops to eliminate the need to pedal in reverse in the middle of a ride. For added convenience, the chainring is compatible with both ANT+ and Bluetooth SMART, so once it's set up, you can head out for a ride without a lengthy setup using your existing head unit.
- Chainring system measures power from your crankset
- Splits pedal stroke to approximate dual-sided power
- Zeroes-out on its own as soon as pedaling stops
- Compatible with major bike computers and head units
View more Road Chainrings
The compatibility chart below, represents cranks released in the last 3 - 5 years. Many of the older cranks are not easily accessible so have not been tested. The below list is not comprehensive and is dictated by crank availability. It will be updated frequently as new models can be confirmed compatible.
|The compatibility chart below, represents cranks released in the last 3 - 5 years. Many of the older cranks are not easily accessible so have not been tested. The below list is not comprehensive and is dictated by crank availability. It will be updated frequently as new models can be confirmed compatible.|
assumed compatible based on others
|105-FC 5750||110||Y||physical crank test|
|R565||110||Y*||assumed compatible based on others|
|Sor||110||Y*||assumed compatible based on others|
|Tiagra||110||Y*||assumed compatible based on others|
|Dura-Ace 7950||110||Y||physical crank test|
|Ultegra 6750||110||Y||physical crank test|
|FSA||SL-K Light - 386EVO||up to 2014||110||Y||physical crank test (5 bolt)|
|Team Issue 386EVO||110||Y||physical crank test|
|Energy||110||Y||physical crank test|
|Gossamer||110||Y||physical crank test|
|Omega||110||Y||physical crank test|
|Trimax Alloy||up to 2015||100||Y||physical crank test|
|Vero||110||Y*||assumed compatible based on others|
|SRAM||S900||110||Y||physical crank test|
|S950||110||Y||physical crank test|
|S500||110||Y*||assumed compatible based on others|
|Red - GXP||110||*Y||assumed compatible based on others|
|Force - GXP||110||Y||physical crank test (10 spd)|
|Rival||110||Y||physical crank test (10 spd)|
|Apex||110||Y||physical crank test (10 spd)|
|Rotor||3D||110||Y||physical crank test|
|Praxis||Zayante M30||110||Y||physical crank test|
|THM||Clacivula SE||up to 2015||110||Y||physical crank test|
|Cobb||Compact||current||110||Y||physical crank test|
4 bolt asymmetric
|Dura-Ace 9000||110||N||4 bolt asymmetric|
|Dura-Ace 7800||110||N||not 110BCD|
|Ultegra 6800||110||N||4 bolt asymmetric|
|FSA||SL-K Light - 386EVO||2015||110||N||4 bolt|
|FSA SL-K Light BB30||110||N||known incompatible|
|K-Force Light||110||N||known incompatible|
|Gossamer BB30||2010||110||N||physical crank test|
|Trimax Carbon||All||110||N||known incompatible|
|SRAM||S300||110||N||single chainring crank|
|S100||110||N||single chainring crank|
|Red 22||110||N||hidden bolt design. shift ramps need to be clocked|
|Red BB30||110||N||not tested|
|Force 22||110||N||hidden bolt design. shift ramps need to be clocked|
|Force BB30||110||N||not tested|
|Rival 22||110||N||hidden bolt design. shift ramps need to be clocked|
|Specialized||S-Works Carbon||110||N||known incompatible|
|Campagnolo||Super Record||110||N||crank arm attachment is not exactly 110|
|Record||110||N||crank arm attachment is not exactly 110|
|Chorus||110||N||crank arm attachment is not exactly 110|
|Athena||110||N||crank arm attachment is not exactly 110|
|Centaur||110||N||crank arm attachment is not exactly 110|
|Veloce||110||N||crank arm attachment is not exactly 110|
|Look||Zed 2||multi||N||known incompatible|
Reviews & Community
Poor battery life
- Familiarity: I've used it several times
Well the powermeter itself is working as expected and seems accurate and reliable.
I have to change the battery every month while I only ride 20 hours.
I am doing calibration before every ride as there is still a gap everytime I do it.
I am contacting powertap support in order to get more information about these 2 defaults.
Buying a 2nd set...
- Familiarity: I've put it through the wringer
1st set works great on the training bike, so hooking up a 2nd set for my race day bike.
Fail all around
- Familiarity: I've used it several times
Basically if you want crappy support and a crappy product prone to failure get this if not look elsewhere. If i could give a 0 star i would.
i bought these through another company and thought hey this should be perfect for what i need. Nothing could be farther from the truth. the first C1 i got failed in a month. I had initial issues with the Ant+ signal dropping out. Called Powertap support they said to move my ant+ receiver. AKA its your fault not ours. HMM ya not so much when a week later no signal for ant or bluetooth. Call them back they send a new C1 out. forget to include an RMA for me to send the other one back (Geniuses i swear). A week of using the new C1 and now similar issue happens. The device will transmit for about 20 seconds and then fails to stay on. Call Powertap back up go hey did this already did all your trouble shooting. They respond initially after 3 days. i email them back and its now coming up on a week later. In the email they asked why i ddin't send them back the other one and i tell them no RMA. Thank the company i purchased it from will refund me the money i paid and already gave me an rma label. They took a grand total of 5 hours to respond.
I won't buy a powertap, sarris, or cycleops now as they are all handled by the same company and their support sucks and apparently so do their products.