e46 M3 Tire Sizing Thread

[Paulo337]

255/40 for a 9.5 is within spec, but you could run into DSC issues as the circumference between front and rear will be off by 3.7%.

I'm assuming 225/40/19 in the front.

Edit: I wouldn't run a 255/40 on an 8 inch wide wheel.

How can I find out or know what the right size to match for the circumference will be for the front?

[oceansize]

How can I find out or know what the right size to match for the circumference will be for the front?

You can use this site to get all the details.

Why not run the factory tire size?

[Paulo337]

You can use this site to get all the details.

Why not run the factory tire size?

Have a set of continental extreme contact with less than 500 miles on them for free if they fit with no issues that’d be grwat

[03A08M3]

With 265/35/18 Yokohama AD09 on the front I get some rubbing on the bumper bracket because the sidewalls are very square, they also run very wide, like a 275 tyre.

I'm looking at fitting some road tyres like Bridgestone Potenza Evo or Hankook K137 in 255/40/18, which although are taller, have a more rounded sidewall. And will be a fair amount narrower than the current AD09s.

If they do end up rubbing, can the bumper bracket be trimmed and the plastic arch liner be heated/moulded to make more room?

Size wise they'll be similar to 255/35/19 which I've seen people running.