Shimano m540 clipless spd mtb pedalscompact dual sided spd pedal designed for everyday use at good value price stable platform can be used with any type of spd shoe and provides support for the foot uses the same design pedal cleat mechanism from the m959 pedal mud repelling design is suitable for year round use cr mo spindle and low maintenance sealed bearing cartridge axle cleat tension adjustment featuresspindle thread bc 916 x 20 tp ispindle material chrome molycartridge spindle y