FORMULA POST MOUNT 20MM RISER ADAPTER 160MM  TO 180MM NEW / SHIPS IN 24HRS SPECIFICATIONS: Manufacturer: Formula May work with other manufacturers of disc brake calipers (buyer is ultimately responsible for compatibility) For raising up post mount brake mounts 20mm, normally for use with 180mm rotors (nearly all post mounts are standard at 160mm) Post mounts can be identified from the other version, I.S. mounts by the distance between the two mounting holes. Post mounts are 73mm center to center between the two mounting bolts Works in front or rear the same Includes only that which is shown in images Please note: It does NOT come with the conical washers that go between the top of the caliper and head of the bolt. We ran out. Given that they go between the head of the bolt and the caliper, it's unlikely that you'd really need them. Replace them with ordinary washers if you want. Or grab some from an old V-brake pad set. The height of a set of two halves of conical washers is approximately 4mm. Condition: New, not in retail packagingFormula