These are Superflux Motor adapters to bolt your superflux motor onto the XR frame. They clamp the motors axle and prevent wear and tear on the axle that may arise from hub bolts loosening up. They may also increase your thermal transfer from the motor to the rails. They also have a few fins to increase surface area and slightly increase heat dissipation.
1 set of PubHubs come with 2x blocks, 2x clamps, 2x M5x30mm Clamp Bolts and an allen key for tightening the clamp bolts.
Installation: Put your motor cable in the block, then attach the clamp (apply Blue Loctite to the clamp bolts. Do not fully tighten the clamps yet, just tighten almost all the way). Bolt blocks onto motor, tighten the axle bolts. Drop motor into your frame, and bolt in you rail bolts. Use the included hex key to fully tighten the clamp bolts AFTER you have assembled your board as you normally would with standard blocks. Take your time tightening, do not over tighten.
I am not responsible for any damage or injury to yourself, others, or property.
Open source files: https://www.printables.com/model/838327-pubhubs-sf-xr-clampys
