WHAT GEAR DO I NEED?

 

CHANGING DRIVEN GEAR?


INDICATED SPEED X NUMBER OF TEETH ON GEAR / ACTUAL SPEED
= NEW DRIVEN GEAR

CHANGING DRIVE GEAR?


ACTUAL SPEED X NUMBER OF TEETH ON GEAR / INDICATED SPEED
= NEW DRIVE GEAR

NO CURRENT DRIVEN GEAR?


NUMBER OF TEETH ON DRIVE GEAR X AXLE RATIO X TIRE REV/MILE / 1000
= DRIVEN GEAR

NO CURRENT DRIVE GEAR?


NUMBER OF TEETH ON DRIVEN GEAR X 1000 / AXLE RATIO X TIRE REV/MILE
= DRIVE GEAR NEEDED

NEED A CORRECTING ADAPTER?


TIRE DIAMETER X .05 X TEETH ON DRIVEN GEAR / AXLE RATIO X TEETH ON DRIVE GEAR
= ADAPTER RATIO

CALCULATING TIRE REV/MILE

63360” PER MILE
TIRE DIAMETER X 3.1416 = CIRCUMFERENCE


63360” PER MILE / CIRCUMFERENCE
= TIRE REV/MILE

CALCULATING SENSOR PULSES PER MILE

TIRE REV/MILE X SENSOR GEAR TEETH OR SENSOR PULSES X AXLE RATIO = PULSES PER MILE

EXAMPLE FOR NEEDING A NEW DRIVEN GEAR


50MPH INDICATED SPEED X 20 TEETH / 55 ACTUAL SPEED
= NEED AN 18 TOOTH GEAR