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Old 15-08-2010, 11:20 AM   #1
BuckTooth
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Default Wheel & Tyre fitment.

Gday everyone,

I know this should probably go under the wheel and tyre section. But seeing as its AU related i'm hoping here will get the answer i'm after.

I have been eyeing off a set of staggered 19x8.5" and 19x9.5" mags for my XR8. Will the 9.5's fit under the back off my AU? Keeping in mind i am prepared to roll the guards if required. Also what size tyres would be suitable if they will fit?

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Old 15-08-2010, 11:25 AM   #2
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9.5" will fit under the back mate...
depending on how low you go you may have to roll the gaurds a little...

I'd go 245/35/19 at the front
and 285/30/19 at the rear and it will keep the same rolling diameter front and rear..
could also go 235/35/19 front and 275/30/19 rear if the 245's are too wide for the front!!

Hope that helps..
kris
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Old 15-08-2010, 01:32 PM   #3
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There's no gain in fitting 8.5"s to the front if you can't fit a bigger tyre than you can on an 8". And if you can only fit a 235 tyre then you are going backwards.

9.5"s will fit the rear if you get the correct offset - must be 30mm or under. Even with 30mm offset you may get some rubbing on the inside. 25-28mm offset would be good.

Edit ... In any event 235s are too small for an 8.5" rim and 275s are also too small on a 9.5" rim. I would fit 255/35-19 front and 285/30-19 rears. You will have to roll your front guards.

Last edited by T3man; 15-08-2010 at 01:38 PM.
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Old 15-08-2010, 01:36 PM   #4
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We're talking 19" rims though..
Don't most of them come in 19x8.5...? not 19x8.0..?
I had 245's on my 8.5" wide 20's with no issue....(at the front)
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Old 15-08-2010, 01:40 PM   #5
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You may have thought there was no issue - fact is that the rim is incorrect size for that size tyre - the sidewalls would have been stretched. Well it is maybe not excessively too small but definitely right on the limit. Your sidewalls on a low profile tyre should be neutral - ie. not stretched out nor bagged in.
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Old 15-08-2010, 01:43 PM   #6
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with the 245's? The walls were stretched...?
Never noticed that..
even with the 19x8.5's i had 245's and they never looked stretched..
When I first got the 20's they had put 225's on them.. Now they were stretched!!

So are you saying on an 8.5" rim you need to put 255's+ in order for the walls not to be stretched T3man...??
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Old 15-08-2010, 01:47 PM   #7
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On an 8.5" rim the correct tyre size is 255 in a low profile fitment ie. anything less than 50% profile. You can use a 245 or a 265 but definitely never consider a 235. And some tyres sizes differ from brand to brand - Toyos for instance tend to be a generous tyre while some others like Kumho can be a little under done.
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Old 15-08-2010, 01:52 PM   #8
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I understand what you're saying..
I have a pdf calc program that I downloaded ages ago that shows the stretch of tyres on different size rims..
If anyone wants it pm me with email addresses and I'll send it..
cheers
kris
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Old 15-08-2010, 01:54 PM   #9
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I've just checked Toyos site and they say a 235 will go on 8" to 9" OK - however, like I said their tyres are usually generous in width - I would be careful and check what other tyre makers said for their tyres because I'm pretty sure most would not recommend a 9" rim for a 235.
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Old 15-08-2010, 06:24 PM   #10
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Well certainly glad to know they'll fit. Now i just gotta find the cash to order them. Thanks fella's
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