Eastern Bikes Piston Gyro 2014 Edition BMX Bike, Gloss Red Frame Material:	1020 Hi-Ten steel Front Hub:	36 hole, with 3/8 chromoly axle, loose ball bearing Rear Hub: Fully sealed 36 hole cassette hub, forged alloy shell, 1pc 9T chromoly driver, 14mm chromoly axle, 5 sealed bearings. Front & Rear Rims: Alloy 36 hole