Who has 18" Rims? - United Bimmer Community

**Rooz** · 07-19-2005, 07:15 PM

Hey, was wondering who here had 18's on their cars. And those that do, could you please post the size of tires you have: IE 235/40/18

**Spieluhr** · 07-20-2005, 03:01 AM

I do, I do!!!

225/35/18

**billycuth** · 07-20-2005, 07:14 AM

I did, till I hit a pot hole. Got to get mine repaired. I had 225/40/18. Pirelli Pzero Nero M+S... Great tire for the money.

**528man** · 07-20-2005, 08:33 AM

255/30/18 Front 285/35/18 Rear

OEM m5 18'' Bridgestone Potanzas

**Rooz** · 07-20-2005, 07:53 PM

^^How you like the staggered set?

Am fixing on going with something like this:
235/40(35?)/18 and 255/40(35?)/18

nick_318is · 07-20-2005, 10:01 PM

The staggered effect should be nice, esspecially if you have a lot of HP, bigger contact area should grip better in the back

**528man** · 08-10-2005, 11:20 AM

it definatly pulls harder than before, but i dont have enough hp to tell a huge difference. i mean they did come off a m5 and i have a 528

**Rooz** · 08-10-2005, 11:53 PM

I ended up going with 225/40/18 GT-Radial Chamipro HPZ-40 Great tires love them handle like a dream. My next set of tire I'll probably go with 235/40/18. But for not going from 205's to 225's was enougth of an upgrade

**xxxbimmer** · 08-11-2005, 04:21 AM

225/35/18

i wouldnt do diff tire sizes in the back......

cause u cant rotate the tires and in more cases u will get understeer......I dont think that a 225 to 235 is going to make that big of a diff

**Rooz** · 08-11-2005, 09:35 AM

Well, so far my tires have been free

my boss still hasen't asked me to pay for them

and I think he has completely forgoten about it, or he thinks that I already paid for them

Storamin · 08-11-2005, 11:51 AM

Rooz! I have 225s on my 15s. WIDER TIRES man, wider tires.

**billycuth** · 08-11-2005, 12:12 PM

I am going to get my M-parallels fixed... -_-

**zeit00** · 08-11-2005, 02:34 PM

I am running 235/40/18.. I wouldn't do stagered (sp?) The change in slip angle would induce understeer.. Oh and wider tires do not make more grip.. only tire composition does.

**BaLAnCe17** · 08-12-2005, 01:50 AM

i have 225/40/r18 (obviously) . the lower the middle number means the wider it gets. its a ratio of something but i forget exactly. so technically 225/35/r18 would be wider. my uncle who is a scca mechanic explained it to me. you will rub like no other if you put 255/35/r18 on there. unless your car is high enough. and possibly w/ the front. i donno. try it and let us know

**Rooz** · 08-12-2005, 05:39 AM

the first number is how wide the tires are.

The second number is the % of the side wall. IE 225/40/18 have a sidewall of:

225*.40 = 90mm