When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm looking at a set of E63 wheels that are 9x18 ET37 up front and 9.5x18 ET52 in back. I'm not sure where we run into clearance problems. What do the wheel experts think about the fit on these?
The wheel calculator says that the rears are 4.35mm wider to the inside and 8.35mm wider to the outside.
The fronts are wider by 4.7mm to the inside and by 20.7mm to the outside.
W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
If these are from a 2010 W212, I don't know if they'll clear our brake calipers. Otherwise they'd make a great set of track wheels. Any way you can try them on first? Are they local to you?
But the front will work if u stretched ur tire like 225 or 235. 18x9 +37
I'm running 19x9 +40 with 245/35/19 & it's to the edge of rubbing when going over speed bumps. U are 3mm more outward, so I recommend u 225 or 235 to avoid rubbing.
W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
Actually, Roswell is right about the fronts. I shouldn't give advice at 4:20 AM.
I can run a 19x8.5" ET48 rim on the front with a 245/35-19 Michelin PSS both without and with a 12mm spacer with no rubbing (but just barely). The spacer moves the effective offset to ET36; so, to run a 9" wide rim and not rub against the fenders, you'd need an ET42 front offset to center it perfectly. The extra 11mm poke to the outside on the ET37 in question over my setup (6mm extra rim width + 5mm offset) will definitley rub against the fender.
Our forum is lucky to have the level of expertise that we've got!
Diabolis, these are indeed off a W212 (2011). They are halfway across he country so I don't have any good test fit opportunities. Can you elaborate on what your concern might be about caliper clearance?
I'm not lowered and don't have any plans to do so. Are you both lowered, and if so is that part of what's causing your limited front tire clearance?
Lastly, these are for track use and I was planning to run a Toyo R888 but in order to get 94Y in an XL tire it looks like I need to go to 255/35 ZR18 up front. Am I SOL with that big a tire on this wheel?
The numbers look good for fitment but the concern should be the brake clearance. Depending on how the spokes are designed, might have to run a spacer. Do you have a picture of the wheel?
^^ oh boy ... with those offsets, spacers would just make matters worst lol
As for the 255 R888 in the front, I wouldn't risk it lowered or not. On the track, at high speed ur car will sits lower & each dips u hit u will feel the front fenders grinding.
The numbers look good for fitment but the concern should be the brake clearance. Depending on how the spokes are designed, might have to run a spacer. Do you have a picture of the wheel?
The design is similar to the C63 wheel with just a bit more concavity, so I doubt that brake clearance will be an issue. That's good, because I probably don't have any room for spacers.
The numbers look good for fitment but the concern should be the brake clearance. Depending on how the spokes are designed, might have to run a spacer. Do you have a picture of the wheel?
Originally Posted by Roswell
^^ oh boy ... with those offsets, spacers would just make matters worst lol
^^ no no Bro, I wasn't questioning Vivid statement. I do agree about the need of spacers if the spokes touches the calipers.. But when u are running 18x9 +37 in the front of the C63, there is not much space for pushing out the wheels furthermore.
Looking closely at the picture leads me to think that the E63 spokes may be a little thicker (deeper) than ours which could put them closer to the caliper if this was a stock C63 8" wheel. However, the outer face of the wheel is 3/4" further our from the hub than ours, so I'm not seeing much risk of interference between the spokes and the caliper. Does that make sense to y'all?
Here's an old post from a member who mounted a replica E63 wheel. He had to add a spacer to get his 8.5" wheel to ET50 for brake clearance. That's equivalent to ET37.5 on a 9" wheel, which leaves these 9" ET37 wheels looking fairly good. https://mbworld.org/forums/c63-amg-w...63-wheels.html
I'm starting to suspect that the biggest risk will be tire rub on the front tires. What exactly might rub on a setup like this? Upper surface of the plastic fender liner? Sheetmetal at the top of the wheel arch? Is it the top of these areas during compression, or the fore and aft areas of the liner when the wheels are turned at max lock?
I would say your fender's arches will rub as that offset and wheel width will push it further out as opposed to OEM fitment. Like Meng said you'll probably need low profile tires.
Also I wouldn't use spacers for the track if you need to clear calipers. Why don't you buy cheap OEM c63 18"? Why e63 wheels?
I would say your fender's arches will rub as that offset and wheel width will push it further out as opposed to OEM fitment. Like Meng said you'll probably need low profile tires.
Also I wouldn't use spacers for the track if you need to clear calipers. Why don't you buy cheap OEM c63 18"? Why e63 wheels?
I'm interested in the E63 wheels because I want to run 18" R888 tires, and the only XL rated ones are 255x18 and 275x18 which fit best on 9" and 9.5" wheels - which happens to be exactly what the E63 uses.
Thanks for the feedback on rub point. If it proves necessary, is it feasible to roll the arch enough to prevent rubbing?
I see you are wanting to run the R888 tires. I ran them on the track on my 67 camaro. They are loud and not very good for heavier cars. Good for a car up to 3400 pounds. After that they are not as strong. For the same price the trofeo R is a much better tire.
W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
Zcct et al - yes, the Trofeo R is a stickier tire than the R888 but even the 245F requires a 9" wide rim to be properly supported (otherwise it rolls over way too much). I've tried it. A 9" wide front rim with just the right offset and spoke thickness will fit without rubbing even under track loads (i.e. full suspension compression under heavy braking and enough steering lock - trail braking into a turn - for the tire to stick out past the fender). I have a Canadian coupe with the APX package, which among other things has the stiffer and 10mm lower "P30" suspension that hasn't been available in the US since 2011, and there is ZERO rubbing under track - or for that matter, any other use. The trick is gettign the right rim where the inside of the spokes will clear the brake calipers at the right offset.
In the pics below (the second is just a crop of the first) I am going through corner 5b at Mosport - the slowest corner at the track where the suspension loads are the greatest - on what USED to be a DPE SP5 19x8.5 ET48 rim (1.5" outer barrel, 7" inner), where I replaced the outer barrel with a 2" barrel, effectively making the rim a 19x9 ET42. The tires that are on the front are 255/35-19 Michelin PSC2s (used Porsche peelers that I wanted to try on for size), with a 10.2" section width. Keep in mind that they're actually 255/35-19, NOT 255/30-19 so overall even larger than OEM. There is ZERO rubbing under track use. The 245/40-18 Trofeo R has a 9.8" section width on a 8.5" rim, so maybe 10" on a 9" wide rim. It's not going to be any wider than what I'm running in the pic.
If these are from a 2010 W212, I don't know if they'll clear our brake calipers. Otherwise they'd make a great set of track wheels. Any way you can try them on first? Are they local to you?
Some good news - I mounted up the E63 wheels today (no tires yet) and caliper clearance is huge. On both front and rear wheels, I can fit two fingers between the caliper and the inside face of the spokes.
It looks like tire fit in the rear will be snug but probably OK. The plastic guard on the shock will be very close to the tire, but that doesn't seem like much of a concern if it rubs.
I'm concerned about front tire. The math says it's roughly equivalent to running a 20mm spacer, and I don't recall anyone having successfully run something that big. The outer face of the 9" wheel up there is nearly aligned with the outer edge of the fender. I suspect that it'll require a lower-than-stock profile and maybe some stretch to avoid a rub.
12-16-2015, 04:52 PM
