PowerTap Magnetless Speed or Cadence Sensor Bike Accessories_Inner Tube Eliminates brake squeal and will

Eliminates brake squeal and will not attack wax on paint or drivetrain

Integral tracer dye that shows under UV light– aids accurate application to ensure total protection

and moto riding

Special wicking sponge draws solvent from the chain as it exits

Based on Pearl Izumi's popular Elite Sock

PowerTap Magnetless Speed or Cadence Sensor Bike Accessories_Inner Tube Eliminates brake squeal and willPowertap's low profile speed or cadence sensor harnesses the advances in accelerometer technology to leave the magnet in the dust along with your competition. Can be programmed for speed or cadence. Easily attaches to crank arm or hub. Dual band Bluetooth Smart and ANT+ compatibility. Low profile design with no magnet required.