Quote:
Originally Posted by 46stude
Well, there's maybe an inch of height difference, which really isn't enuff to kick the speedo out like that.
And, it read the same with the 70s that were on the Burb when we got it. Forgot to put that in my original post.
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not to argue, but just wanted to split some hairs... for information purposes, ya know?
245/75/16 = 95.72 in circ. 30.47 in height
265/70/16 = 96.15 in circ. 30.61 in height
265/75/16 = 99.43 in circ. 31.65 in height
What does this mean and how does this effect us?
the difference between a 245/75/16 and 265/70/16 is not noteworthy BUT...
If you change from 265/70/16 to a 265/75/16 that means that if your speedo reads 60mph, your actually moving at 62.05 mph, meaning a 2.05 mph difference.
If you change from 245/75/16 to a 265/75/16 that means that if your speedo reads 60 mph, your actually moving at 62.33 mph, meaning a 2.33 mph difference.
I am not a gear ratio kinda guy but I do know that changing the tire size changes your rear gear ratio slightly and that slight amount will undoubtedly change the way your ecm reads your tire rotation vs rpm, which would change your shift points and your speedometer reading. i dont know what the fullest extent of this all means just because i am simply thinking out loud but, i would assume that this means your fuel economy would change.
this would be the exact same as changing the rear axle for a different gear ratio, everything would change, drastically. 4x4 people would know a heck of a lot more than i could ever begin to understand.
-Izzy