What is the difference between a KEO CLASSIC 3 and a KEO CLASSIC 3 PLUS? The material used for the contact area. The 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.WHY YOU'LL LOVE IT?THAT LITTLE EXTRA WHEN IT COMES TO STIFFNESSLarge, wide contact area for excellent stability thru the pedal strokeA total weight of 350 grams, all includedAll of LOOK's expertise at an affordable priceTECHNICAL SPECIFICATIONSSPINDLESpindle material ChromolyBODY & PLATFORMTechnology SpringBody material CompositePlatform material Stainless steelPlatform area 400 mm²Platform width 60 mmTotal stack height (pedal + cleat) 17,8 mm (11.5 + 6.3 mm)Q Factor 53 mmRETENSION & CLEATSRetention 8 to 12Cleats KEO gripWEIGHT & ACCESSORIESPedal 140 gWeight pair + cleats 350 g