Shimano XTR PD-M9100 pedals get a redesign, providing more stability and the ability to shed mud better than ever before. These improvements are the result of a refined pedal body shape that offers a wider edge to edge contact area over the outgoing M9000 pedals for an increased shoe to pedal interface and thus, better power transmission. It also features rounded edges to help shed mud and prevent accumulation.
M9100 SPD pedals retention mechanism is basically the same as the benchmark SPD pedals that's been around for decades with wide, open-ended tabs that allow easy entry and security when clipped in. The open design allows muck to flow through, so it doesn't hamper your ability to engage in a hurry and you can get back in quickly after an impromptu hike-a-bike or remounting after a sandy 'cross pit. The larger flat platforms area on the inboard and outboard edges are also a boon to gravel riders looking to keep the sole of your shoe solid on the pedal.
Shimano XTR PD-M9100 SPD pedals come with SM-SH51 single release shoes cleats and are also compatible with SM-SH56 multi-release shoes cleats. It has chromoly spindles and spin on sealed bearings. The tension of the retention mechanism can be adjusted via a hex screw on the back of each pedal on both sides.