Race Face ERA Cranks 136 Length:165mm ISEV-ISII is for a Shimano

ISEV-ISII is for a Shimano I-SPEC EV shifter mounting to a Shimano I-SPEC II brake

Helix R cassettes have replaceable gear clusters

7900 2RS MAX - Angular-Contact

it is also the most expensive of the 440 series alloys and requires multiple rounds of heat treatment and cryogenic treatment to achieve its superior mechanical properties

Race Face ERA Cranks 136 Length:165mm ISEV-ISII is for a ShimanoA new Era for carbon cranks Redesigned pedal inserts are bonded directly to the carbon layup making Era the strongest, stiffest and most durable carbon crank ever created by Race Face. One of the lightest in its class with boots to match your chosen colour, Era will outlast your bike while staying scuff free and looking great. Its time to let your cranks do the talking. Specs Available Chainlines : 52mm 136 Spindle + DM Ring 55mm 136 Spindle + DMW