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Mad Roger Mad Roger is offline
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Default What's the performance difference between 15 inch, 16 inch and 17 inch tires (all else equal)?

On Wed, 19 Jul 2017 23:08:20 -0600,
rbowman wrote:

I searched for that thread.

Is it this one?
Why 20" wheels, by Micky, May 8, 2017
https://groups.google.com/forum/#!to...ZxvM%5B1-25%5D

If so, I'll read it to see if there was more accurate information there
than here.


Don't bother. There was more bull**** in that thread than in a feedlot.


Thanks. By now you can tell that I care about two things:
+ I have an "opinion" about everything, but I don't trust my opinion, so,
+ I try to get facts that either support or contradict that opinion.
If those facts are reliable, I change my opinion.

My original opinion was that there was a performance benefit to
larger-diameter fitments, but my new opinion is based on the facts
unearthed in this thread, which is that you'd be hard pressed to gain the
one known performance advantage, which is to put the engine into a sweeter
spot on the torque curve.

However, even if you did that, there are many other factors, the
next-biggest of which is the contact patch, but there are others such as
the weight change, materials change, suspension change, etc.

Hence, larger fitments have, essentially, no performance advantage and most
likely have a negative effect on performance overall in most cases.

If anyone has data that contradicts that opinion, I'm all ears.