Hope Jockey Pulley Wheels - Black - Pair - 12T PDP|Colour if you increase rotor size

if you increase rotor size you will need to use different adaptors

You will need either the Half Bottle with DogBone or a B-RAD base to mount the Half Bottle

Shimano took the flat side a bit further

Sintered/Metallic: Pros

this race will add an extra 3mm to 1

Hope Jockey Pulley Wheels - Black - Pair - 12T PDP|Colour if you increase rotor sizeThese Hope Jockey Wheels are CNC machined from solid billet aircraft grade Aluminium, and containing stainless steel sealed roller bearings with low contact seals for reduced drag. Labyrinth style spacers encapsulating protecting the bearings, increasing product life and reducing maintenance. Lightweight yet robust design.