Fits all e-bikes except Shimano with 104mm BCD spider

Forged and machined from 6061 aluminium

1 x 20mm spacer

Vents: 10 vents

Silicone grippers help them to stay in place

Hayes Post Frame Or Fork To Post Caliper Brake Mount - 23mm Increase PDP|PLP|Rail Material Fits all e-bikes except ShimanoThese adaptors are designed to work with Post style brake mounts on frames or forks when running Hayes Dominion brake calipers. Who's this item for: If you are running Hayes Dominion brakes you will need to use these adaptors as ones made by other brands won't provide enough clearance for the calipers. Options: 20mm increase: 180mm rotor on 160mm post mounts or 200mm rotor on 180mm post mounts. 23mm increase: 203mm rotor on 180mm post mounts. 43mm