Thread: VX wrong trans
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Old 04-13-2012, 02:14 PM   #28 (permalink)
some_other_dave
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Quote:
Originally Posted by SiVX View Post
Question:" My 185 tires are 10.8% larger than the VX 165s. Does this mean my RPMs for a given speed should be about 11% lower than normal?
If you are asking if changing tire sizes will change what the speedometer reads for a given RPM in a given gear, then no.

If you are asking if it will change the actual speed for that RPM, then yes.

The speedometer only "sees" how fast the drive wheels are turning. Changing the tire size will change what that actual speed is, but the speedometer and tach will still read the same.

-soD
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