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Tyre Question

SXCSKY

By SXCSKY,
in General Maintenance

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IanH Collaborator

IanH

Posted
Posted

As far as I know it's fine becuase your trying to keep the overall circumfrence the same but the rear is wider so it has to have a smaller sidewall.

Click here for a tyre calculator to help you see what happens when you put the same profile on both front and rears. Just type in your front and rear tyre sizes and see the difference.

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siksII Grand Master

siksII

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yes it is fine, because the 40 or 45 rating is just an indication of a ratio of the height of the tyre wall compared to the width of the tyre. So obviously if 235:45 and 255:40 mean that the tyre heights will be similar. if both the tyres were the same then the ratio would mean that one tyre had a definetly higher side wall.

i have the same tyre sizes as you btw, and they are fine.

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benm Grand Master

benm

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Click here for a tyre calculator to help you see what happens when you put the same profile on both front and rears. Just type in your front and rear tyre sizes and see the difference.
Thats an excellent site, thanks.
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Sumo Mentor

Sumo

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i have the same setup, 245/45/17 on the front and 255/40/17 on the back and have no worries. Just dont do what i did and get ripped off for a pair of bridgy S03's 255/40/17 ($450 ea.) I thought he quoted me the price on the pair - not each. :bonk:

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siksII Grand Master

siksII

Posted
Posted

s03s are a good tyre though.. good tyres = pricey. especially huge sizes like 255s.

i just got a set of pirelli p6000s,, 255/40/zr17 for $90 each.

catch= second hand. one was at least 95% there.. the other was 30% gone on one side and 50% in the middle(done care about that part too much :D so yeah had to make sure the new edge of that one was on the inside.

but still. it would have cost me double 180 to get just one good new tyre. so even if i use them for half as long its good value :)

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