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Re: Not affected by tire size? R u sure? (archive)
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Posted by Steve on September 11, 2000 at 04:53:42:

In Reply to: Not affected by tire size? R u sure? posted by Jess on September 11, 2000 at 02:16:15:


Hi Michael,

I'm not sure if it is possible for any "distance travelled" sensor to still be accurate if you change your tire size. It has to make assumptions based on what the car does - such as number of wheel rotations. Right?

Unless of course it uses some form of radar or gps or other motion sensor that doesn't depend on wheel rotations - but I doubt it...


Well sure, but in this case we know that our car's odometers are not linked to gps systems or anything. So I beg to differ with Mike's comments (Mike's my buddy and we give each other a hard time) that tire size is irrelevant. It IS relevant because tire rotation and distance covered is directly related. When you change tire size, nothing is recalibrated, yet the circumference changes. What you're doing is very very slightly making things inaccurate. But I'm sure it's all within operating ranges. :)

Steve

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