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Old 10-06-2019, 08:39 AM   #31 (permalink)
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Just an FYI:

There's been a lot of work about measuring RR in car tires in advance of regulations requiring publication of said RR values. One of those things is the difference between testing on a wheel vs a flat surface (rolling road). The result was that there was a very good correlation between the values. I can't seem to find the study on the internet, but I have notes from a conference I attended.

In other words, when it comes to testing RR in car tires, it doesn't matter whether the tires are tested on a flat surface or a large diameter wheel, the values are proportional.


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Old 10-06-2019, 08:58 AM   #32 (permalink)
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The pothole factor is one of the reasons I went to 65 aspect tires v the OEM-supplied 60 tires on my Mazda3. I'm now riding on 20565R16 Ecopias. They're working well.
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Old 10-06-2019, 09:15 PM   #33 (permalink)
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Originally Posted by basjoos View Post
Going to a taller sidewall means you are less likely to dent your rims when you hit a pothole.
This, and the fact that 13" tyres used to be considerably cheaper than the 14" ones, were the main reasons why my mom lurked about it a few months ago.
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Old 10-08-2019, 11:55 PM   #34 (permalink)
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Originally Posted by hat_man View Post
I believe mine are 5x114mm but I'm not sure about the center hub.
That's where I messed up. Got lots of used tires & wheels & they all fit nicely. Saw one spare, but never used tire mounted on a 5 by 114.3 mm bolt pattern wheel & 40mm offset, just like I needed. Got it for $30. A week later, I REMEMBERED that I FORGOT to measure the center hole. Needed a 67mm center hole, but the wheel was 62mm. Oh, well. I can still use the tire, if I can't find a Lexus buyer, who needs a spare wheel/tire combo.

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