BSM 1M with OEM M3 18" wheels & H&R springs

[///1M]

Originally Posted by M3Power79

Staggered setup FA : 8,5 with 245/40/18 PS2 Tyres
RA : 9,5 with 265/40/18 PS2
I bought this set second hand with tyres on, at the back they are already a bit worn but the rims are spotless. Planning to go for PSS.

Do these tires have a taller profile than the OEM tires do? (is there more rubber between the rim and the road?)

///1M

[Chapman1977]

Originally Posted by ///1M

Do these tires have a taller profile than the OEM tires do? (is there more rubber between the rim and the road?)

///1M

Just by a hair..According to a calculator that I found on the internet the fronts are 0.1 cm smaller, rears 0.1 cm bigger in diameter than the original sizes so you definitely can't tell the difference by looking at them.

Cheers

[M3Power79]

Originally Posted by ///1M

Do these tires have a taller profile than the OEM tires do? (is there more rubber between the rim and the road?)

///1M

Of course you have more rubber and quite a lot. Did you know a car absorbs 70% with his tyres and only 30% with his suspension?

[M3Power79]

Originally Posted by Chapman1977

Just by a hair..According to a calculator that I found on the internet the fronts are 0.1 cm smaller, rears 0.1 cm bigger in diameter than the original sizes so you definitely can't tell the difference by looking at them.

Cheers

i did the same calculation on http://felgenkatalog.auto-treff.com/ and had the same results : only a slight difference from 0,15% in overall diameter but that's not what he meant i think.

[Chapman1977]

Originally Posted by M3Power79

i did the same calculation on http://felgenkatalog.auto-treff.com/ and had the same results : only a slight difference from 0,15% in overall diameter but that's not what he meant i think.

Yeah, you might be right...but I thought that must be obvious (40>35) and he must mean the diameter of the whole wheel..

Cheers

[///1M]

Originally Posted by Chapman1977

Yeah, you might be right...but I thought that must be obvious (40>35) and he must mean the diameter of the whole wheel..

Cheers

Thanks Chapman and M3Power for your replies. Yes, I meant to ask if the tires on the 18" setup have thicker rubber; I didn't initially see that they are 40 vs the OEM 35.

This would certainly make the 18" wheels more attractive for my purposes.