Track Specific SRM Powermeters : Scientific Accuracy as used by virtually all top National Track Teams.
The new SRM Origin Track Powermeter has an integrated 24mm axle and track standard 144 BCD 5 hole body.
Supplied WITHOUT chain rings.
Available in a variety of crank lengths from 160 to 175mm.
Weight from 694g
144.5 or 148.5 Q factor