BBS RS - e30 m3 5 lug question

[namsayin]

^ thanks d-rock

god damn its a simple question....i should just post this on s14 and ask people who run 197s. and stop all the bitchin thats going on here.

[8380 Labs]

He understands that but he wants it to be top secret! :hitler:

hahahahaha.

[z31maniac]

Are you saying leane the same lips on the car and run a 1/2" wider barrel? It helps to be specific when you are asking for help.

I don't know the spec on the 197 and I'm not going to look it up, but by adding a 1/2" wider barrel, you will make the offset 6.35mm higher.

So for example the wheel would go from ET 10 to ET 16.35.

Don't act like an ass when you ask a vague question and people can't help out because they need more info.

[namsayin]

^ thats exactly what i was asking, sorry for the confusion. I am aware of the difference in offset when you change the lips or barrels but all i am concerned about is the backspacing. The final offsets will be calculated after i can determine a 1/2" wider barrel will fit or not.

[z31maniac]

^ thats exactly what i was asking, sorry for the confusion. I am aware of the difference in offset when you change the lips or barrels but all i am concerned about is the backspacing. The final offsets will be calculated after i can determine a 1/2" wider barrel will fit or not.

Backspacing and offset are directly correlated, they are two different ways to determine the same thing (where the wheel sits in relation to the hub.)

I was just telling you that whatever the current offset of the wheel is, if you add a barrel that's .5" wider, you are going to move the ET higher by 6.35mm.

Add a .5" wider lip and you move the offset lower by 6.35mm.

OK, so I looked up the 197, it's 17x9.5" ET 13, adding a .5" wider barrel ends up at 17x10" ET 19.35, or the offset most people are looking for when running that size.

[namsayin]

^ yeah thanks for that

the thing i am worried about is if the 1/2" wider barrel will hit the rear shocks or not, i never bolted up my 5 lug so i am unaware of the clearance issues in the rear.

[z31maniac]

17x10 ET ~20 shouldn't have a problem, that's the common offset for guys that run staggered 17x8.5" and 17x10"s.

Look up ZiMMie's car on Keskins.

DO you have early or late arches? You'll need 225/35 and seriously stiff springs to those wheels off. Or destroy your fenders.

[Mystikal]

There's more to it. E30 M3 hubs have a different geometry (track) than 4x100 ones. They are close to iX.

197s are 17x9.5 +13, according to google. So as my little wheel dude in training just posted, you'd end up with 17x10 +20. That setup just barely clears on a 4x100 RWD E30, and will clear with around 5-6mm to spare with M3 hubs.

Fender clearance will be a huge issue unless you will have flares of some sort.

[namsayin]

^ thanks!

[Jonsku]

I've 10x17" BBS RS's on the back of my cabrio, ET is 14, 6.5" barrell. There aren't lots of room between the rim and fuel lines on the right hand side, and also the spring upper plate is getting close (though the rim won't sit on that height if you've short shocks).

Adding an extra 0,5" to my barrell wouldn't clear the body, but with different middle-piece it would. Though then i couldn't use as wide lips as now..