The PD-R550 pedal offers an extra wide contact surface for more efficient power transmission.The resistant surfaces of the carbon composite 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 . FEATURESWide spring tension adjustment rangeLarger entry target for easier engagementComposite bodyExtra-wide platform for maximum efficient transfer of powerDurable stainless steel body plate reduces flex and wearWide bearing placement for stable, uniform load distributionThe legacy of SHIMANO design, quality and performanceArea of intended use : racing bikeMaterial pedal axle: nickel chromoly steelMaterial pedal body: carbon compositePRODUCT SPECIFICATIONSMODEL NO PD-R550SERIES TIAGRA 4700 SeriesColor Black | GrayAverage weight 310 ( /pair)Remarks Wider spring tension rangeWide platform ✔Road clearance (deg.) 32Binding Single SidedCartridge axle ✔Cleat included SM-SH11Cleat retention adjuster ✔Optional cleat SM-SH10, SM-SH12Type RoadReflector SM-PD65Sealed mechanism ✔Stack height (mm) 16.5