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Power Meter Comparison Tool

Step 1. Bike – Road

Step 2. Power Meter Type – Chainring

Step 3. Select Power Meter

PowerTap is the only manufacturer of a chainring-based power meter.

PowerTap C1 Chainring
Accuracy+/- 1.5%
Battery TypeCR2032
Battery Life200 hours
Cadence DetectionAccelerometer
L/R Power BalanceYes (estimated)
ANT+ / BLEBluetooth SMART and ANT+
Weight (1)150 grams (added)
CompatibilityThe PowerTap C1 Chainrings will bolt directly onto almost any 5-bolt 110 BCD compact crank, including carbon cranks
ProsYou can keep your current crankset (spider and crank arms) since you’re only replacing your chainrings. This is a big plus
The PowerTap C1 transmits left/right power balance
The PowerTap transmits data via both the ANT+ and Bluetooth SMART wireless protocols
ConsiderationsBecause of the nature of the C1 spider, it can’t take a ring smaller than a 36t. This is because the diameter on a 34t for example, is too small and would interfere with the pod on the C1

Select PowerTap


(1) When considering weight, be sure to calculate the added weight of the power meter. For example, if a PowerTap hub weighs 320 grams, but the hub you are replacing weighs 250 grams, the net addition is 70 grams.

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