Disc Rotor Minimum Thickness Gauge

A tool to check to see if your disc brake rotors are too thin. The two slots cover the majority of SRAM and all Shimano disc brakes. If it fits, it's time to replace the rotor. 1.55mm side works with all SRAM Avid rotors except HS21.50mm for all Shimano and Hope rotors (not vented)As a note its best to try from the underside of the rotor as the tops don't always contact the pads. A pair of micrometers are always best, but this works too.