new ratio new rpm rpm ÷gear ratio xx new ratio new rpm example 8000 6.58 6. ... 35 7720 7720 example 8000 ÷ ÷ 6.58 xx 6.35 to determine final drive to ... teeth top gear teeth bottom gear x r&p ratio final drive teeth top gear ... ÷ ÷ teeth bottom gear x r&p ratio final drive or or gearing ... gearing formulas ratio mph ratio xx mph xx 336 rpm 336 rpm tire dia tire ... dia rpm tire dia rpm xxtire dia ratio ratio mph 336 mph xx 336 ... rpm r&p ratio 4.86new ratio new rpm x r&p ratio x new ratio new 4.57 r&p ... 7720 7-32 teeth6.58 7-34 teeth 7720 x 6.35 example 8000 ÷ 6.58 x 8-33 teeth ... 8000 ÷ 6.35 gearing formulas g ratio x mph x 336 rpm tire dia ra gear low ... tio listed 128 128 .000 .964 .960 .955 .950 .931 .920 .909 .897 .885 .875 .867 .857 ...