Specifications : Name :  Rear Chain Sprocket Brand : TDPRO Condition : 100% new Material :  metal  FIT    : 420 Chain Fit 110cc 125cc 140cc PIT PRO PIT Bike Trail Bike Dirt Bike Thumpstar Diameter of Sprocket / Cog  :around 15.4cm (6.1") Diameter of Centre Hole   :  around 4.8cm (1.9") Distance Between Mount Hole(centre to centre)   :  around 6.8cm (2.7") Tooth   :  37 T Package including : 1pc of the Rear Chain Sprocket