Retro 1993 Cannondale M2000 aluminium MTB frame measures 16″ centre of bottom bracket to top of seat tube 20″ centre of head tube to centre of seat tube 135mm rear wheel spacing rim brakes only for 26″ wheels 68mm bottom bracket 103mm head tube designed for 1&1/4″ oversized fork steerer see my other listings for parts from this bike including Pepperoni forks, force 40 brake mounts, Ritchey Logic headset and Control Tech Stem.