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

[Mystikal]

The wheels are BBS RS 16x8.5 +18 and 16x9 +12.5. What tire size do you recommend for a s52 swapped convertible e30 with rolled fenders?

205/45 and 215/45, respectively.

[Roysneon]

How about M-SystemII's on a late model car with E30M3 suspension? Want as little stretch as possible.

Wheel specs:

17x8 et20 front
17x9 et22 rear

[alpineII_dirty]

Okay so im coming on 15x8, i would like a decent poke so any problem with 0 offset or if not +20? Running on Vogtland springs and as well getting e90 drop hats, so what tires can i run to clean up the gap as much as possible..215/50 rear? 205/50 front????

[dhcg86]

How do I make style 42s from an e39 with 235/45/17 fit on my 86 325e ?


5x120 bolt pattern. 17x8 et 20

I either drill and fill or swap in 5lug right? But once I do that, how do I get the wheels to fit? Gotta have big tires for my planned 400hp

and if I dont do the 5 lug, whats the best tire size for 400hp? Im worried about not being able to put all that power to proper use

[cardnation]

How do I make style 42s from an e39 with 235/45/17 fit on my 86 325e ?


5x120 bolt pattern. 17x8 et 20

I either drill and fill or swap in 5lug right? But once I do that, how do I get the wheels to fit? Gotta have big tires for my planned 400hp

235/45 might as well be monster truck tires on these little old E30's.

I rolled one of my A4 wheels (same specs as above) up against my vert, and I couldn't even lower the jack down.

[dhcg86]

sigh, all the more reason to get a good 16" wheel with some wide sticky tires

[asuj158]

the 17x7.5 are +45 how would those fit? im eventually going to roll the fenders if that helps

[dhcg86]

17.5J x16 ET 35, borbet type Cs.

they also appear to have some flat spots in 2 of the tyres.

Can I use these on my e30 without spacers? Will spacers allow me to run wider tires in the rear?

Should I worry about the flat spots?

Sorry for all the questions; Im a noob!

[Mystikal]

How about M-SystemII's on a late model car with E30M3 suspension? Want as little stretch as possible.

Wheel specs:

17x8 et20 front
17x9 et22 rear

215/40 F 245/35 R is ideal. Requires a flat rear roll and linear, high spring rates. Otherwise 215/40 all around.

[Mystikal]

Okay so im coming on 15x8, i would like a decent poke so any problem with 0 offset or if not +20? Running on Vogtland springs and as well getting e90 drop hats, so what tires can i run to clean up the gap as much as possible..215/50 rear? 205/50 front????

There's guys running the +0 15x8s but I think they look terrible without lots of front camber. I'd suggest +20 with 10mm rear spacers. 205/50 all round.

[Mystikal]

How do I make style 42s from an e39 with 235/45/17 fit on my 86 325e ?


5x120 bolt pattern. 17x8 et 20

I either drill and fill or swap in 5lug right? But once I do that, how do I get the wheels to fit? Gotta have big tires for my planned 400hp

and if I dont do the 5 lug, whats the best tire size for 400hp? Im worried about not being able to put all that power to proper use

Tires are useless. I wouldn't trust redrilled wheels with that much power, and with adapters you can't fit wide tires.

[Mystikal]

the 17x7.5 are +45 how would those fit? im eventually going to roll the fenders if that helps

Needs massive spacers, 25mm all around minimum to look decent.

[Mystikal]

17.5J x16 ET 35, borbet type Cs.

they also appear to have some flat spots in 2 of the tyres.

Can I use these on my e30 without spacers? Will spacers allow me to run wider tires in the rear?

Should I worry about the flat spots?

Sorry for all the questions; Im a noob!

They need spacers. 15mm all around is ideal. 225/45 can fit all around. Try rolling on them to see how bad the flat spots vibrate (put them on the rear).

[ACHTUNG]

I don't know why my brain can't figure this out but here's a 3-piece wheel scenario for you to help me calculate:

The 3-piece wheels are 16 X 7.5 et 23 with 1" lips. What would be the new wheel offset if I added 2" lips?

Using an online split rim offset calculator I came up with the new wheel width as 8.5" and the offset would be et 10.3. Did I calculate this correctly? If so, how would this new width and offset fit on a late model 325i?

[cardnation]

I don't know why my brain can't figure this out but here's a 3-piece wheel scenario for you to help me calculate:

The 3-piece wheels are 16 X 7.5 et 23 with 1" lips. What would be the new wheel offset if I added 2" lips?

1 inch = 25.4 mm

So 23-25.4= -2.4mm

I've had a long day so check my math. :yawn: