use it either towards the headtube or your seatpost depending on your preference and comfort

more intense use and increased mass due to the presence of the motor and battery

The Top guide

the Park Tool HMR-4 features:

Race Face Cinch Direct Mount Narrow-Wide Chainring - Direct Mount - Race Face - Easton Cinch - 6-0mm Super Boost Flip - Round - 30T - 9-12 Speed - Alloy Virtual Parent use it either towards theReplacement rings for your Race Face Cinch cranks. These direct mount rings feature a narrow wide tooth profile and are constructed from 4mm thick 7075 T6 aluminium or steel to prevent flex. The narrow wide tooth profile is necessary in single chainring setups to help prevent the chain from dropping off. Who's this item for: Riders with a RaceFace Cinch crank looking to upgrade or replace their chainring. Chain retention technology: Proven Narrow Wide