tire trivia

[paul b]

I went to a 345/30-19 rear tire, a difference of almost 2 inches in diameter, it changed the speedometer accuracy but not the odometer. I guess they get signals from different sources.

 

[2112]

:confused

 

[Empty Pockets]

:confused

+1

No matter from what source the 'signal' comes, a larger tire diameter would have to affect the reading of both 'meters' (given all other factors remained the same), wouldn't it? The speedo and odometer both reflect calculations based on the number of rotations the tire makes per engine rpm (so to speak)...and a larger diam. tire will obviously roll further per each rotation than a smaller diam one. So both the speed & miles indicated ought to be off.

'Too deep for me...:willy

 

[BlackICE]

To my knowledge both are derived from the speed sensor in the transaxle.

 

[MTV8]

How did you take your measurements to determine the odometer is still accurate?

 

[paul b]

I have a 3.0 mile route I use. The odometer stayed at 3.0 before and after adjusting The Revs. per mile using a Diablosport preditor.