best size tyre for 18"

[barry798]

just got my new rims and in in a dilema been told i need 225/40/18 for the front and 265/35/18 ,but also been told i need 35 for the front instead of 40 please can some one help

[shaunwil]

http://www.miata.net/garage/tirecalc.html

Shaun

[pdtaylor18]

265/35 might fit the rims better and help protect the lip but 255 would be just as good, the fronts I would go for 235/40. This keeps the aspect ratio as close to original.  I take it they are 9\'s and 8\'s for the width ? as that will make a difference.
see the link for tyre sizes in the wheels section, its a sticky for this reason.

[barry798]

thanks they are 8,s and 9,s  just wont to make the back a bit wider.and wonted 225 so they dont rub

[pdtaylor18]

well the sizes i quoted will not rub but make sure the offsets are good and you will be ok.

[tinker-27]

235,40,18 front   265,35,18 rears  on 8" and 9" is spot on

[shaunwil]

Try and keep the rolling radius as close to the 255x40x17 and you should be fine. The 35s just mean you have a bit more alloy than rim. The link will work out the percentage difference between original and stock.

Didn\'t think 265 was stocked as readily as 255 and 275 though.

Shaun

[barry798]

jet tyres in pitsea can get them for next day 265/35/18 for £150 ea think ill go for 235 on the front then and not 225

[Ed_RX7]

got 275\'s on my rear and my car is LOW...rear arches have been rolled though...and no problems.

[shaunwil]

got 275\'s on my rear and my car is LOW...rear arches have been rolled though...and no problems.

What offset is the wheel ??

Shaun

[barry798]

the rear wheel is 9.5, did think of getting a 275 but didnt think it would go ,the car is on standard suspention as for the off set not sore fink its 35 i no the front is going to try it on the car in the morning before getting tyres fitted