The Slammer is the perfect first bike. At home in the neighborhood or the skatepark allowing a beginner rider to fit in with their friends without the high price tag. 100% Hi-Ten, Tapered Legs, 31mm Offset GT NBS tires/ Single Wall Rims GT Power Series Cr-Mo 3pc. Cranks   Frame frame100% Hi-Ten Steel Tubes, DT Gusset, American BB, Seat Stay U-Brake, External 1-1/8" H/T, Removable Rotor Tabs sizes availableO/S fork100% Hi-Ten, Tapered Legs, 31mm Offset wheel size20 Wheels rimsAlloy Single Wall, 36h front hubSteel Loose Ball 3/8" Axle rear hubAlloy Semi-Sealed 14mm Cassette front tireGT NBS 2.4" rear tireGT NBS 2.4" spokesStainless Steel, 14g Drivetrain rear cogs9T 1pc. Driver chainKMC S1 crankGT Power Series 3pc Chromoly 170mm, 19mm x 8T Spindle, GT NBS 25T Steel Chainwheel bottom bracketAmerican Loose Ball Bearing pedalsGT Logo PC Platform Cockpit handlebarGT 2pc Freestyle, 100% Hi-Ten Steel, 8.5"H x 29"W, 3°Up, 11° Back stemGT NBS Top Load 40mm, 32mm Rise gripsGT Super Soft Flangeless headset1-1/8" Threadless, Steel seatpostAlloy, 25.4mm x 200mm saddleRailed saddle Brakes brakesNBS Alloy U-Brake w/ Soft Compound Pad brake leversNBS Alloy