The difference between a KEO CLASSIC 3 & a KEO CLASSIC 3 PLUS is the material used for the contact area. The little extra, stainless steel rather than composite, optimizes pedal stiffness & the transfer of power from you to your bike. As with the CLASSIC 3 the plus also has Large, wide contact area for excellent stability, adjustable tension to aid with easy & fast clip in / clip out. This pedal is great for if your new to using clip ins but want a little extra stiffness than the classic 3 provides Spindle material Chromoly Technology Spring Body material Composite Platform material Stainless steel Platform area 400 mm² Platform width 60 mm Total stack height (pedal + cleat)17, 8 mm (11.5 + 6.3 mm) Retention 8 to 12 Cleats KEO grip Pedal 140 g Weight pair + cleats 350 g