[DJ Rocc]

Anyone running slightly wider tires on their 4 Series Grand Coupe? I have the OEM Bridgestone RFTs, Mixed Setup.

[kadify]

Not to thread jack, and I'm not positive but if I'm understanding wheel metrics correctly, if you have 225/45R18 then a 255/40R18 should also fit the same wheel while being slightly wider?

[alohasurftoad]

Originally Posted by DJ Rocc

Anyone running slightly wider tires on their 4 Series Grand Coupe? I have the OEM Bridgestone RFTs, Mixed Setup.

255 are the widest that can go on 8.5" rears, no change necessary.

the 225 fronts may be increased to 245/40/18 on the 8" fronts and will reduce a lot of the understeer associated with the 225 front width.

[DJ Rocc]

Originally Posted by kadify

Not to thread jack, and I'm not positive but if I'm understanding wheel metrics correctly, if you have 225/45R18 then a 255/40R18 should also fit the same wheel while being slightly wider?

I have mixed/staggared setup with 225/45R18 in Front (8.00 Wheel). And 255/40R18 in rear (8.50) Wheel.

[DJ Rocc]

Originally Posted by alohasurftoad

255 are the widest that can go on 8.5" rears, no change necessary.

the 225 fronts may be increased to 245/40/18 on the 8" fronts and will reduce a lot of the understeer associated with the 225 front width.

Ok, so can't change the width in the rear without changing wheels, but can go to 245 in the front? Will the 245's in front stick out of fender at all?

[alohasurftoad]

Originally Posted by DJ Rocc

Ok, so can't change the width in the rear without changing wheels, but can go to 245 in the front? Will the 245's in front stick out of fender at all?

it will not stick out

[DJ Rocc]

Originally Posted by alohasurftoad

it will not stick out

Thanks, but seem to be having trouble getting an ultra performance in that size rft