ASK ALL WHEEL/TIRE FITMENT QUESTIONS HERE - The Official Wheel/Tire Fitment Thread

[Eric]

Grassroots Motorsports. It's a magazine run by the SCCA (I think) and they run tire testing CONSTANTLY for that crowd; the XS is the current time king. They have forums filled with tire geeks like myself.

cool, i just subscribed to their mag about a month ago, didn't know they had an active forum! I love the articles they put out.

[carthik]

Anyone know how 15x7 offset 33 would fit on a 91 318is (front and rear)? anyone have any pics, or of something close?

[jdbmw325is]

if i were to get a set of Rota RB 16x7 or 16x8 what whould my offset have to be? and would i have to roll the fenders for the 16x8?

[RickSloan]

Bead to bead. Lip to lip is usually around 3/4" wider.

Diameter is edge to edge, and the furthest part is again around 3/4" more.

ok im def 16x7 if i were 16x7.5 would 205/45/16 still be ok with a +11et?

and when i say +11 i mean the offset of the wheel is -11et like a normal wheel and i have to run a 20mm spacer putting it 11mm past center.

[j0oftheworld]

'89 325is
Kerscher Futura
17x8.5 et30 all around.
Spacer/Bodywork/Tire recommendations?

grazie!

[Mystikal]

Too make these fit i need...
http://honolulu.craigslist.org/kau/pts/1610183437.html

...to know the offset of the wheels.

[Mystikal]

Anyone know how 15x7 offset 33 would fit on a 91 318is (front and rear)? anyone have any pics, or of something close?

That setup would leave the tire sitting within a few mm of the front strut housings. Too close for me to recommend without at least 3mm spacers on the front axle.

[Mystikal]

if i were to get a set of Rota RB 16x7 or 16x8 what whould my offset have to be? and would i have to roll the fenders for the 16x8?

Well, what offsets are available? Usually you should start thinking about it that way. +10 to +25 is good.

[Mystikal]

ok im def 16x7 if i were 16x7.5 would 205/45/16 still be ok with a +11et?

and when i say +11 i mean the offset of the wheel is -11et like a normal wheel and i have to run a 20mm spacer putting it 11mm past center.

20mm spacer on a +11 wheel is -9.

I'd run a 195/50 on a 16x7 at that offset.

[Mystikal]

'89 325is
Kerscher Futura
17x8.5 et30 all around.
Spacer/Bodywork/Tire recommendations?

grazie!

Well, what are you going for? I can spec that to run 245s all around or to be 100% flush to the fenders with 195/40/17 tires, lemme know what works for you.

[j0oftheworld]

Well, what are you going for? I can spec that to run 245s all around or to be 100% flush to the fenders with 195/40/17 tires, lemme know what works for you.

Performance minded please.
The most "meat" I can get.. etc
Not into staggered/stretched.

Oh, and Spec E30 suspension for now, GC/Konis eventually. :)

Thanks!

[Mystikal]

Performance minded please.
The most "meat" I can get.. etc
Not into staggered/stretched.

Oh, and Spec E30 suspension for now, GC/Konis eventually. :)

Thanks!

No problem.

You can choose either 235/40/17 (more tire choices) or 245/35/17 (easier to fit). These will require 10mm spacers on the front, and nothing on the rear. This unequal spacing will lead to a less balanced "stance", but the only way to fit such large tires on those wheels. You should be okay with just a flat fender roll in the rear, although camber plates would help pull the front tires in a bit. It won't rub, but they will be poking outside of the fender slightly.

[Matt Arruda]

i want to purchase some drag wheels to mount slicks on but non of them list ET can anyone tell me if a 15x8 with a 5.5 back space will fit an e30 I'm not concerned about tire size just rim clearance

Thanks in advance

[Mystikal]

i want to purchase some drag wheels to mount slicks on but non of them list ET can anyone tell me if a 15x8 with a 5.5 back space will fit an e30 I'm not concerned about tire size just rim clearance

Thanks in advance

That equates to +25, which is about perfect for a 15x8 on the rear. Should be close to dead centered between the trailing arm and bodywork.

[jeff_b]

This may have been asked before, so forgive my laziness. 16X7 40 offset 225 45 16 tire. Is there any way to get them on?