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Power Meter Comparison Tool

Step 1. Bike –┬áRoad

Step 2. Power Meter Type – Crank Arm

Step 3. Select Power Meter

4iiii makes the most accurate, lightest and easiest to use crank arm-based power meters.

Cost$399 - $599
Accuracy+/- 1.0%
Battery Type2032 coin cell
Battery Life100 hours
Cadence DetectionAccelerometer
L/R Power BalanceNo
ANT+ / BLEBluetooth SMART and ANT+
Weight9 grams (plus weight of crank arm)
Compatibility4iiii makes a version for Shimano 105 5800, Shimano Ultegra 6800 and Shimano DURA-ACE 9000
ProsAffordable. The 4iiii is the cheapest, direct force power meter you can buy
Lightweight. The 4iiii is the lightest power meter and only adds 9 grams of weight
Transmits power data via both Bluetooth SMART and ANT+ wireless protocols
ConsiderationsMeasures left leg power only and doubles it to derive total power. Left-only power meters are quite popular as they are more affordable and still provide accurate, consistent data. However, left-only power meters aren’t for everyone. See our Total vs. Left Only article for more information

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