PRODUCT INFOMATION Name: Road Bike Lock Pedals Brand: BUCKLOS Model: Black-RS580 Size: CA.104mm*90.5mm*28.5mm (4in*3.57in*1.12in) Material: Nylon + Chromium-molybdenum Steel Weight: CA.480g/Pair(With packaging) Pedal Axle Size:9/16 in Adapt to: Road Bike/Indoor Bike Compatible:Spin Bikes With 9/16'' Spindle Feature:SuperGrippy/Easy To Install/Smooth Bearings/High-Quality Design/Durable/Non-Slip.