PowerTap C1 Chainring Compatibility

I'm thinking about getting a set of PowerTap C1 Chainrings and so I was looking up spider/crank compatibility.

Here's the list, but you should always consult the compatibility chart on PowerTap's website as the list may change.

The PowerTap C1 Chainring Power Meter is currently $699 on Amazon, which is a pretty great price for dual side power and zero fuss. Seriously considering getting it instead of power meter pedals.

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.
All cranks below are 110 BCD (bolt circle diameter) only.

POWERTAP C1 COMPATIBLE CRANKS
May be updated: see https://www.powertap.com/page/c1-compatibility-chart
Manufacturer    Model                   Model Year      Notes
Shimano         105 -FC 5650                            Assumed compatible
                105 -FC 5750                            Physical test
                R565                                    Assumed compatible
                Sora                                    Assumed compatible
                Tiagra                                  Assumed compatible
                Dura-Ace 7950                           Physical test
                Ultegra 6750                            Physical test
FSA             SL-K Light 386EVO       Up to 2014      Physical test (5 bolt)
                Team Issue 386EVO                       Physical test
                Energy                                  Physical test
                Gossamer                                Physical test
                Omega                                   Physical test
                Trimax Alloy            Up to 2015      Physical test
                Vero                                    Assumed compatible
SRAM            S900                                    Physical test
                S950                                    Physical test
                S500                                    Assumed compatible
                Red GXP                                 Assumed compatible
                Force GXP                               Physical test (10 spd)
                Rival                                   Physical test (10 spd)
                Apex                                    Physical test (10 spd)
Rotor           3D Plus                                 (Not tested)
                3D                                      Physical test
Praxis          Zayante M30                             Physical test
THM             Clavicula SE            Up to 2015      Physical test
Cobb            Compact                 Current         Physical test

POWERTAP C1 INCOMPATIBLE CRANKS
Manufacturer    Model                   Model Year      Notes
Shimano         105 –FC 5800                            4 bolt asymmetric
                Dura-Ace 9000                           4 bolt asymmetric
                Dura-Ace 7800                           Not 110 BCD
                Ultegra 6800                            4 bolt asymmetric
FSA             SL-K Light 386EVO       2015            4 bolt
                SL-K Light BB30                         Known incompatible
                K-Force Light                           Known incompatible
                Gossamer BB30           2010            Physical test
                Trimax Carbon           All             Known Incompatible
SRAM            S300                                    Single Chainring crank
                S100                                    Single Chainring crank
                Red 22                                  Hidden bolts, clock shift ramps
                Red BB30                                Not tested
                Force 22                                Hidden bolts, clock shift ramps
                Force BB30                              Not tested
                Rival 22                                Hidden bolts, clock shift ramps
Cannondale      Hollowgram                              Known incompatible
Specialized     S-Works Carbon                          Known incompatible
Campagnolo      Super Record                            Not exactly 110
                Record                                  Not exactly 110
                Chorus                                  Not exactly 110
                Athena                                  Not exactly 110
                Centaur                                 Not exactly 110
                Veloce                                  Not exactly 110
Look            Zed 2                                   Known incompatible

Last updated Dec 5, 2015

Hmmm there is a brand new set of PowerTap C1's on eBay right now for $550 so tempting. I think I'll resist until the spring though. Maybe some gently used Christmas presents will be for sale...

Chart has been updated, please go to:

https://www.powertap.com/page/c1-compatibility-chart

Hi,

Did you end up trying these out?

Thanks,
Yurii

Haven't bought a set yet, I just finished building a new bike and it looks like I'm going to stick with compact 50/34 chainrings again so now might be a good time to upgrade from my Force GXP with first gen Stages NDS power meter (alloy) to Red GXP with the C1's. Thanks for reminding me, after Christmas is often a good time to find deals!

Skye

Quote
Yurii
Hi,

Did you end up trying these out?

Thanks,
Yurii

One thing I just noticed is the C1 only goes down to 50/36 teeth not 50/34 like a true compact, might be a factor if you like to spin up a lot of steep grades in your area. On the other hand, it would extend the usable range on the small ring.

Skye