Smooth Black Aluminum Alloy Foot Axle Stunt Bike Peg for BMX Bikes 3/8'' (Kid-Size) Suitable for front wheel or back wheel axles of bicycle Weight: 78g Inner Diameter: about 0.9 cm ( 3/8" ) Diameter: about 2.8cm ( 1.1" ) Length: about 7 cm ( 2.75 " )