What is the difference between a KEO CLASSIC 3 and a KEO CLASSIC 3 PLUS? The material used for the contact area. T he little extra, stainless steel rather than composite, optimizes pedal stiffness and hence the transfer of power from you to your bike. As for the rest, we stick to what works: fast clip in / clip out and easy tension adjustment. SPECS : Spindle material: Chromoly Technology: Spring Body material: Composite Platform material: Stainless steel Platform area: 400 mm² Platform width: 60 mm R etention: 8 to 12 Cleats: KEO GRIP Pedal: 140 gr Weight pair + cleats: 350 gr Stack height + cleats: 17.8 mm