This bike has the following spec except that I have upgraded the brake pads not because they had worn out but because they had no stopping power.Frame: Hi Tensile Steel, Fork: Hi Tensile Steel, Chainset: 3 piece tubular Cro-Moly, Chainrings: 39 tooth steel, Cassette: 14 tooth cog, Chain: Z410 Chrome, Pedals: Alloy platform, Front Brake: Caliper Rear, Brake: U-Brake, Brake Levers: Tektro, Handlebars: Pro 7" Hi Tensile Steel, Stem: Alloy forged, front load, Headset: 1 1/8" Steel, Grips: Blank Logo grips, Rims: Alex Y2000 Front, Hub: Alloy 36 hole 10mm, Rear Hub: Alloy Flip Flop 48 hole 10mm, Front Tyre: Kenda Kontact, Rear Tyre: Kenda Kovert, Saddle: Blank Slim padded seat, Seatpost: Steel, Seat Binder: Alloy single bolt, Accessories: 2 pairs of pegs. Thanks very much for looking and grab yourself a bargain.