1991 E31 850i

08-27-2025

Hello. I'm new here

I recently purchased a 850i and the previous owner had some modifications done to it. I want to revert it back to OEM as much as possible while doing small tweaks here and there to make it a more drive-able vehicle.

5L V12, 6mt, with an LSD. Those are the basics. It came with "Deep dish Momo wheels" Pictures attached.

I'm not at all familiar with 90s BMW "stuff". Are these wheels decent? should I be looking for something that fits more readily available tire sizes?

An image attached to this post, provided by the poster

08-28-2025

Gottagofast wrote
I recently purchased a 850i and the previous owner had some modifications done to it. I want to revert it back to OEM as much as possible while doing small tweaks here and there to make it a more drive-able vehicle.

5L V12, 6mt, with an LSD. Those are the basics.

Congrats and condolences.
Congrats on a cool car.
Condolences to your wallet, as all new E31 and E32 parts will be priced *10x by BMW, if even if available. Literally.

More info here: https://bmwccae31.com/

Gottagofast wrote
It came with "Deep dish Momo wheels" Pictures attached.
I'm not at all familiar with 90s BMW "stuff". Are these wheels decent?

The answer will be highly subjective.
They are definitely NOT stock.
However, if they are round and manage to keep the air in the tires, they are better than nothing already.

Gottagofast wrote
should I be looking for something that fits more readily available tire sizes?

Congrats on starting at the beginning - identifying what tires you want to ride on and THEN finding the wheels that will keep them round for you. Most folks go the other way - buy blingy wheels, and then find out that you might be SOL on tires in that fitment.

Depending on your budget and intended purposes, either getting OEM wheels (or clones), forged wheels (for durability and performance), or any wheels that fit desirable set of tires (summer performance? winters?). That would be the most reasonable starting point.

HTH,
a

08-28-2025

afadeev wrote
Congrats and condolences.
Congrats on a cool car.
Condolences to your wallet, as all new E31 and E32 parts will be priced *10 by BMW, if even if available. Literally.

More info here: https://bmwccae31.com/

The answer will be highly subjective.
They are definitely NOT stock.
However, if they are round and mange to keep the air in the tires, they are better than nothing already.

Congrats on starting at the beginning - identifying what tires you want to ride on and THEN finding the wheels that will keep them round for you. Most folks go the other way - buy blingy wheels, and then find out that you might be SOL on tires in that fitment.

Depending on your budget and intended purposes, either getting OEM wheels (or clones), forged wheels (for durability and performance), or any wheels that fit desirable set of tires (summer performance? winters?). That would be the most reasonable starting point.

HTH,
a

Thanks for the heads up. I had it PPI'd and according to the mechanic, it's in a fairly good shape, all things considered. It's at the dealer right now getting safetied which is mandatory in Ontario.

Mechanically, the car is great. It does have a bunch of non critical issues but it seems manageable. Here's the PPI report:

"Steering wheel has play up and down, headliner sagging, horn not working, windshield washer sprayers weak pressure, 2 front jack pads missing, trunk liners redone, tires out of date (2012), FR tie rod end play, FR wheel bearing play, Front right and left thrust arms worn, upgraded sway bars front and rear, engine oil leak potentially from upper oil pan, rear left lower ball joint boot split, rear muffler rust holes, left rear shock mount previously repaired, fuel filters dated 2006, front left and right door paint bubbling, front right fender repainted, front bumper lip painted, valve cover gaskets x2 leaking, drivers seat bottom rear portion not operating, passenger seat lower bottom twist, front to rearward motors on passenger seat slow, passenger seat not folding forward, pass strut tower bolts potentially redrilled or slotted to fit shock"

I looked at this site to determine original wheel size and specs, I hope it's correct:

https://www.wheel-size.com/size/bmw/8-series/1991/

"7.5Jx16 ET15
Center Bore / Hub Bore: 72.5 mm
Bolt Pattern (PCD): 5x120
Wheel Fasteners: Lug bolts
Thread Size: M12 x 1.5"

I need to determine the max tire size I can fit without rubbing, then I'll look for wheels.

08-30-2025

Nice Momo Quasar Wheels!!

08-30-2025

Joaco135 wrote
Nice Momo Quasar Wheels!!

Cheers.

I decided on 18x8.5 fronts and 18x9.5 rears. I have a friend that is sponsored by Superspeed so we can order the wheels and test fitment. Debating between A-S 4 or EC DWS 06 Plus for longevity.

09-09-2025

Delivery complete

09-09-2025

Congrats. One of the GOATs.

09-09-2025

Congrats! I remember seeing one while passing a dealership in the early 2000s. I turned in and parked my MKIII Toyota Supra next to it and took a pic, since they look related.

09-11-2025

May have bought two more V12s.....

09-11-2025

Gottagofast wrote
May have bought two more V12s.....

Are those the 750iL and S600 from Throttle House?

09-12-2025

Dagstar wrote
Are those the 750iL and S600 from Throttle House?

Yes. Good eye.

09-19-2025

A nice family gathering.

An image attached to this post, provided by the poster

12-24-2025

Sick whip man! Love those wheels

03-25-2026

Nice looking car. The manual transmission version is especially sought after.

While this forum is good for a lot of things, if you want a superb resource for E31s, check out the E31 forum on bimmerforums.com. I’m not sure how I would have been able to keep my cars (yes, plural — a 1996 850Ci and a 1994 850CSi) on the road without the knowledge and assistance from that group.

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1991 E31 850i