tomvcarter

Hi have a set of HRE P40s which i have taken off my M3, but rather than sell them i was hoping to fit them to my c63, but i understand that the bolt patten is different between BMW and MB.
Does anyone know where i can find a bold pattern converter that woudl work?
I know they exist, but not sure if it can be done in this instance?

dacatz

bmw bolt pattern is 5 x 120 and i think mb use 5 x 112
http://adaptitusa.com/bmwwheeladapters.aspx
this site have the adapter u need but i think your rim will not fit, because M3 use low offset and C63 use high offset!

tomvcarter

Thanks i will take a look, any ideas about spacers for the C63 just to make the stock wheels that bit more agressive?
Also what are the classic aftermarked wheesl for MB (as BBS is to BMW)?
if any...
Thanks

Yuille36

Sir, You are exactly right. Both BMW and MB have different bolt patterns, although they are both 5 lug, the spacing between bolt holes are different and will not fit. I'm sure that you can buy a conversion kit somewhere

benyl

That isn't the issue.

The offset is the big issue.

On a 19x10 wheel, you can run a ~+25 offset on an M3. Maybe even lower.
The C63 needs +50

The converters only make it worse. A +25 wheel now becomes a +20 or less.

pdjafari

I know when you have wheels w/ lower offsets to get them to fit, a good machine shop can sometimes shave the hub. But in this case I think an M3 runs a ~+18-22 ET rear....the C63 has like a ~ 45-50ET (?) so there's no way I'd shave that much off a rim just to get it to fit...not even sure if its plausible/possible. I think you'd start hitting suspension components (control arms/shocks/springs)

I know of members however, who have shaved the hub to fit M3 wheels onto a normal 3 series b/c the offset is just slightly higher on the 3 compared to the M.

tomvcarter

so is it impossible?

pdjafari

Nothings impossible, with the right amount of money. But for the amount you'd spend trying to get those wheels to fit you could probably buy a new set made for your car.

HRE P40s have no lip just spokes if I'm not mistaken. You'd need to have somebody modify the inner barrel somehow to avoid hitting your suspension components. Like I said I'm not sure how safe/realistic it would be to modify the wheels for this purpose. Your best bet is to sell them to an existing M3 owner and put that money towards buying a new set for the C63

tomvcarter

Im told this would work:
http://www.ezaccessory.com/Wheel_Ada.../5000-5000.htm

But thats from the website themselves, anyone able to chip in?

TLDream

They probably work, since there is a business of it. Also, I've done similar things in the past on my Audi S4. They do work, if you find the right pieces and wheel.

The problem with those kind of adapters are that, do you really trust 503 HP on that thing? Imagine going at high speed and making abrupt turn or trying to stop on a dime. Or in a crash? Do you trust the manufacturer of those parts? What about Merc warranty?

Since I am older now and have more on the line, I wouldn't do it that way anymore.