The GT Bikes Grunge 20 Kid's BMX Bike is constructed with durable 1pc cranks, all-terrain tires, 2pc bars and even a numberplate FTW. Specifications Fork - GT Hi-Ten Steel, 1" Threaded Steerer Front Tire - GT 20 x 1.95" Rear Tire - GT 20 x 1.95" Rear Cogs - 16T Coaster Chain - KMC S1, 1/2x1/8" Crank - Forged One-Piece Type, 127mm, 32T Pedals - Jr.