Speedplay pedals are incredibly lightweight thanks to intelligent engineering. The engagement mechanism is housed in the cleat not the pedal. This lets you have a double sided pedal but only carry one mechanism (rather than one on each side of the pedal).inverted engagement mechanism saves weightinstantaneous release puts an end to low-speed fallsself centring cleat pushes out dirt on engagementnon-centring flee float minimises knee strainprecision cartridge & needle bearingsperfect for MTBs & touring bikes 20 degree release anglecompatible with SPD 2-hole shoe fixings 250gstainless spindle