Specifications : Brand : TDPRO Condition : 100% new Name : 420 Chain sprocket Diameter of Sprocket / Cog : around 17cm (170mm) Diameter of Centre Hole around 7.6cm (76mm) Distance Between Mount Hole(centre to centre) around 6.5cm (65mm) Tooth 41 T Material : metal Fitment : universal for 428 Chain Fit 110cc 125cc 140cc PIT PRO PIT Bike Trail Bike Dirt Bike Thumpstar