Rbon91

iTrader: (6)

Just wondering on tyre sizes soon to be fitting new wheels and carlton flares to my blob project, thinking of putting 285/40/18 on the back and 265/40/18 at the front... can I do this? Or can it damage the diff with different tyre sizes?

Thanks ryan

alcazar

iTrader: (2)

You're going to get different answers here, many will be of the ill-informed "Do it mate, it worked great on my RS Turbo..." type

The short answer is this: find an online wheel-size calculator, and enter the numbers above. Don't forget wheel sizes. If the rolling radii are more than 1% different, you will wind up the centre diff.

It's your car, you can take the risk if you want, of course.

HTH

Rbon91

iTrader: (6)

Thanks for the advise

wheels are
XXR 530 18x9.75 et20

tyres front thinking 265/40/18
Rear 285/40/18
Cheers ryan

alcazar

iTrader: (2)

Here's the difference in rolling diameter: 669.2mm 685.2mm

That's about 2% larger.

I wouldn't, but it's up to you.........

Rbon91

iTrader: (6)

Ok mate cheers for advise.. not sure what tyres to go for all round tho..

alcazar

iTrader: (2)

Can you not go 265 all round? Or does anyone do 275?

Rbon91

iTrader: (6)

Yeah thats what im thinking of doing.. apparently some of the lads in states are running 285 all roumd no probs

riiidaa

iTrader: (2)

play with the calc further

you listed

front 265/40/18 (try 265/45/18) etc - you'll find it'll be less 'out'
Rear 285/40/18

Rbon91

iTrader: (6)

Ok pal cheers