HOLE CENTRE 76mm (HUB). 92mm DIAG TO HOLE CENTRES. 7mm THICK (428 PITCH). PLEASE CHECK MEASUREMENTS PRIOR TO PURCHASE.
THERE ARE 2 MAIN CHAIN PITCHS ON PIT BIKES AND ON MOST BIKES IT DOES NOT TELL YOU ON THE CHAIN WHICH SIZE IT IS. THERE ARE APROX 5 DIFFERENT REAR SPROCKET FITMENT PATTERNS USED SO YOU WILL NEED TO CHECK THE DIMENSIONS PRIOR TO PURCHASE. FOLLOW THE SIMPLE STEPS BELOW TO DETERMINE WHAT YOU NEED AND TO AVOID ERRORS & COSTS FOR RETURN.
1. CHAIN PITCH. MEASURE A FRONT OR REAR SPROCKET THICKNESS. 6mm = 420. 7mm =428.
2. SPROCKET/WHEEL FITMENT. MEASURE FROM 1 BOLT CENTRE TO THE BOLT CENTRE OPPOSITE (SO TAPE GOES OVER THE CENTRE OF THE HUB). MEASURE THE HUB SIZE WHERE THE SPROCKET SITS OVER. (THESE MEASUREMENTS ARE WHERE PEOPLE MAKE THE MOST MISTAKES)
3. TEETH. MORE TEETH ON THE FRONT WILL GIVE GREATER TOP SPEED AND MORE MPH IN EACH GEAR BUT MAY REDUCE ACCELERATION. MORE TEETH ON THE REAR WILL REDUCE TOP SPEED BUT WILL GIVE FASTER ACCELERATION. BEFORE ORDERING A BIGGER SPROCKET CHECK YOU HAVE ENOUGH CHAIN LENGTH.
ITEM IS IN STOCK READY FOR DISPATCH. ORDER BEFORE 2pm TUESDAY TO FRIDAY FOR SAME DAY DISPATCH OR BEFORE 12 MID DAY ON MONDAYS. P&P IS CALCULATED BY WEIGHT AND IS ONLY SET FOR MAINLAND UK. EXTRA WILL BE CHARGED FOR NORTHERN SCOTLAND, ISLES, NORTHERN IRELAND ETC. YOU CAN CALL US 0N 01789 766777 MON-FRI 9am TO 5pm.
