Cr-l & cr-r there is a user-friendly design for convenient installation. Cr-l for left pedal and cr-r for right pedal. Before you install the new pedals, look for the 'l' and 'r' marking on the axle durable hex-head threaded pins there are 8 hex-head threaded traction pins per side for providing sufficient grip and control while being the easiest to get off of in the event of a crash standard 9 16 standard 9 16 threads to fit seamlessly with most bikes. Such as bmx, cruisers bicycle, kids' bikes, road bicycles, mtb bicycle, mountain bicycles, junior bicycle, city bicycle, etc wide bicycle pedals we design with 104mm wide pedals, suitable for most foot size. Can withstand high pressure, durable without breaking,pls use with confidence left & right pedals : to easy installation,we have divided the pedals on the left and right with signs, l for left r for right. International standard 9 16 inch screw thread fits for bmx, mtb, mountain bike, hybrid bike, old school, cruiser, commuter bike, dirt jumper, folding bike, road bike- touring, track bike, unicycle, urban bike lightweight and durable: this mountain bike pedals weight only 0.66Lbs 302g , sealed bearing biking pedals protect spindles from water and dust and let you enjoy cycling wherever you want with no worries. What’s more,this bike flat pedals was made with cnc integration aluminum alloy material,give you a sense of security, no matter how rough the terrain wide platform & super grippy: with 101mm wide platform pedal...