Gday all. I have a set of 14x7 ROH Rebels that I am going to put on my LJ. At the moment, it is fitted with stock 13's, with 175/75R13 tyres. How high a sidewall do I need on the 14's to keep the same rolling diameter?
Cheers, RIM
Tyre Heights
Started by
RIM-010
, Oct 14 2006 11:11 AM
5 replies to this topic
#1
RIM-010
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Posted 14 October 2006 - 11:11 AM
#3
_DocDamage_
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Posted 14 October 2006 - 12:59 PM
This can be a controversial subject, there is no such thing as a rolling radius. I assume your trying to maintain speedo accuracy. A tyre with a circumference of 2000mm will roll 2000mm for every revolution regardless of profile or tyre pressure, so just wrap a tape measure round your tyre and get a 14" with whatever profile gives you the same total circumference, easily done without fitting one.
#4
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Posted 14 October 2006 - 01:03 PM
I spent 21 years in the tyre industry. I get asked these question all too often and can answer them accurately in seconds.
#5
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Posted 14 October 2006 - 01:14 PM
I wouldn't doubt your accuracy there Chopper. I'm at work getting distacted from important forum reading and your post wasn't up when I started writing.
#6
rodomo
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Posted 14 October 2006 - 01:32 PM
Or there is this.
http://www.miata.net...e/tirecalc.html
Maybe a Mod. could pin this?
http://www.miata.net...e/tirecalc.html
Maybe a Mod. could pin this?
Edited by rodomo, 14 October 2006 - 01:41 PM.
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