Mountain Bike Hydraulic Brake Bleed & Travel Blocks

For use when bleeding hydraulic brakes, or for when transporting a bike with the wheel removed.

The thick block is for when you have removed your brake pads and wish to bleed your brakes.

If you want to bleed brakes with the pads still in (officially inadvisable, but it's done all the time), the thin pads come in handy for both resetting the distance, and keeping them from getting pushed in while you're working.