Tyres

[2008V8calais]

I'm due for new tyres on my VE Calais. I just have the standard 18" wheels with 245/45r18 rubber on them. I was wondering what's the widest tyre I can fit on the standard wheels ? I plan on running 245 up front but would like to put 255 or more on the rear. I have rolled guards as well if that is of any help?
Cheers

 

[Micaxe]

You have to be careful that the outside diameter is the same or else the ABS & traction control starts playing up due to different sizes.

 

[Banjo79]

I can't help with your question, but if the experts were to say 10mm max, you've got to ask yourself, is it worth not being able to rotate front to back for such a minimal gain in rear width. Aint no bragging rights from 255's.

 

[ducker85]

I just have the standard 18" wheels with 245/45r18 rubber on them. I was wondering what's the widest tyre I can fit on the standard wheels ? I plan on running 245 up front but would like to put 255 or more on the rear. I have rolled guards as well if that is of any help?
Cheers

So you have factory 18x8" rims. I wouldn't go wider then a 265 although the the 255s are more common and easy to too

You have to be careful that the outside diameter is the same or else the ABS & traction control starts playing up due to different sizes.

This is not true. Have seen all sorts of tyre diameters and size used especially on the G8s and never seen a complaint about that.

 

[glennho]

I was wondering the same! Ive got 18x8.5 jet chrome and was wanting to put 275x40x18 on the rear? Just a thought though.

 

[JTmofo]

I'm due for new tyres on my VE Calais. I just have the standard 18" wheels with 245/45r18 rubber on them. I was wondering what's the widest tyre I can fit on the standard wheels ? I plan on running 245 up front but would like to put 255 or more on the rear. I have rolled guards as well if that is of any help?
Cheers

Try these calculators.........

Tyre Size for Rim Size/Width Calculator - What's the best tyre size for my rim?
I've no idea what your rim widths are, but an 8" isnt recommended above 245.
8.5" will take a 255.

Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit
You can calculate poke/tuck/rolling diameter here if you know your offsets. Handy calculator.

 

[JTmofo]

I was wondering the same! Ive got 18x8.5 jet chrome and was wanting to put 275x40x18 on the rear? Just a thought though.

I had 275 on a 9" rim and it was very square, I'm gonna say and 8.5" has no hope.

 

[Mike Litherous]

The onl problem with "overs size" tyres is u have to run slighly lower pressure as they can bow out the centre. 255 prob not much of an issue where 275 would be.

U also have to be careful as not all tyres are created equal. Some are significantly wider in the same size as others.