The PD-R550 pedal offers an extra wide contact surface for more efficient power transmission. The resistant surfaces of the plastic pedal body ensure a long service life. A contact surface of the cleats that is wider than the previous version ensures optimal power transmission. A very long service life of the pedals is achieved through the complex sealing of the bearing in connection with the rust-free nickel chrome steel axle . Technical specifications: Intended use : racing bike Material pedal axle: nickel chromoly steel Material pedal body: plastic Material contact area: stainless steel cleat plate (changeable) Bearing: sealed compact bearing unit Freedom of movement: n/a Trigger hardness: adjustable Release angle: 32° Compatibility sole: k Compatibility pedal plates: Shimano SM-SH11 (included), SM-SH10, SM-SH12 Color: Black Weight: 310g *Pedals are sold as a pair (left and right).