bike stem length:45mm,See 2nd picture for exact length.
Fork diameter is 28.6mm (1-1/8")
Suit for MTB ,BMX, DH, downhill bicycles, fixed equipment, road bikes, etc.
The bike stem is easy to install, just connect up the original front fork tube. Four bolt bar clamp holds handlebar securely in position, locked solid to the mountain bike stem, no flex or slipping.