Every GT Fly 2011 with Free Helmet from wiggle is fully safety checked and adjusted by our CyTech accredited mechanics before despatch. Entry level dirt jumping and street bike. Sizes: wheel, 20.5” top tube Frame: GT dirt design, Hi-Ten Fork: GT street design, cromo steerer Crankset: Cromo tubular 3 piece, 25T steel Bottom Bracket: Mid-size sealed bearings Rear sprocket: 9T Rims: Alex G303, aluminium, 32/36H Tyres: Kenda K-Rad 2.125” front, Kenda KoRolla 2.1” rear Hubset: Front-steel body. 3/8” axle; rear-alloy cassette, 9T driver, 14mm axle Brakes: Front-N/A, Rear-Tektro aluminium U-Brake Brake Lever: Tektro full aluminium Handlebar: GT street bend, Hi-Ten, 7.5” rise Stem: GT freestyle design Saddle: Slim mini street design, 8mm rails Seatpost: Steel, 25.4mm x 200mm