16" lightweight double butted 6061 aluminum frame fits someone around 5'6" give or take a couple inches. 26" wheels Just built up and tuned this Ibex with Shimano XT and LX parts. Bike shifts and brakes excellent with hydraulic disc brakes. Brand New cartridge bearing SE headset. Bontrager disc wheels are in great shape. Continental Vertical Pro tires are in good shape with new tubes. New grips. Seat is in good shape. This bike is ready to ride or race!!!