Quote:
Originally Posted by mcrews
ok, let me help you.....
you said...."it's the TIRE that changes effective gearing" REPEAT "THE TIRE"
THen you say two different different tires effect nothing.
THus a contradiction..... 
Maybe read the several hundred posts I have on tire size/ diameter effecting mpg.
oh, and I stand by the FACT that a reduction in a 16 inch tire in 1940 will FACTUALLY effect the ratio when using a 13 inch tire. PERIOD.  |
what I said was the tire diameter (result of height) has no impact on gearing. tires of equal height roll the same number of times in a mile. You said the wheel size would impact gearing, which it won't. I'm not saying two different tires of equal height can't return different fuel mileages, just that it won't be due to gearing. Could be tread design, could be weight, rolling resistance, etc etc etc but it would NOT be a result of gearing.
Example: I swapped from 15" wheels to 16" on my van. Went from 235/75R15 tires to 225/75R16. Gearing did not change, either effective or ring and pinion. Go figure.