OEM-GT Rear Sprocket & Hub Set Mini Bike Go Kart 44 Tooth For 40/41/420 Chain 3/4 Axles. heavy duty 44T rear sprocket DIAMENTIONS: Mount Hole Distance 2-1/16'' and 2-7/8'' across. OD of sprocket 7-1/4'' and ID is 2''. Material : Steel. INCLUDES OEM-GT Go Kart, Mini Bike Brake Drum or Sprocket HUB 3/4" Bore Universal Bolt Circle Dimensions : 4" Outer Diameter 3/4" Bore with 1/4" keyway & 2 Set Screws. (4) 1/4" Bolt Holes on a 3.228" Bolt Hole Circle. (4) 3/8" Bolt Holes on a 2 7/8" Bolt Hole Circle. Mounting hardware and 1/4'' key stock included. Commonly used on Go karts, Mini bikes and ATVs. OEM-GT Rear Sprocket & Hub Set Mini Bike Go Kart 44 Tooth For 40/41/420 Chain 3/4 Axles. Brand new heavy duty 44T rear sprocket DIAMENTIONS: Mount Hole Distance 2-1/16'' and 2-7/8'' across. OD of sprocket 7-1/4'' and ID is 2''. Material : Steel. INCLUDES OEM-GT Go Kart, Mini Bike Brake Drum or Sprocket HUB 3/4" Bore Universal Bolt Circle Dimensions : 4" Outer Diameter 3/4" Bore with 1/4" keyway & 2 Set Screws. (4) 1/4" Bolt Holes on a 3.228" Bolt Hole Circle. (4) 3/8" Bolt Holes on a 2 7/8" Bolt Hole Circle. Mounting hardware and 1/4'' key stock included.