E46 18's - 225/40 or 215/35

[anythingcars]

Just getting a set of 18" MVII Rims for my 320Ci, but i understand the tyre options to be either 225/40's or 215/35's - What do most people go for?

I can see the 215/35's looking a bit odd as the Tyres surely look to small on the car??

[mmm-five]

Surely the tyre size will depend on what you had originally on the car and on the width of the wheels you're putting on - otherwise your speedo will be wildly over/under reading.

There's also a 5% difference between a 215/35 and a 225/40.

If it's a 7j rim then 215/225 is fine, if it's an 8j rim then 235/245 is fine, if it's a 9j rim then 245-265 will be fine.

Try this tyre calculator to see which size is closest to your originals http://www.miata.net/garage/tirecalc.html

[anythingcars]

Yeah i agree completely but thought people with 3 Series Coupe's would know exactly which Tyre size is the "norm" with 18" BMW wheels (8" wide i believe) but either way just the standard 18" MV Alloys really..... I think 225/40 seems more like it personally.

[toastboy]

I have 225s on the front 255 on the rear. 330ci.

[soprano]

yeah 225 is the norm for the fronts