Apox

Maybe I'm just a noob and the total width of the tire doesn't increase going up in size of wheels, since there's less rubber, but if it does, there's really no more room in there.

Apox

So, final result turned out pretty well. Needed 5mm spacers in front, and I put 10mm in back (5mm would have given enough clearance, but I couldn't find any with a lip, so I doubt it would be a good idea). 235/40/18 front and 265/35/18 rear.

loudandheard

Looks good, any rubbing with the 265 in the rear?

Apox

Not at all, they stick a bit out though, so I guess it might rub if I put 3 people in the back seat, but that will take some time to find out since I almost never drive around with a full car.

tw2

Very nice, do you notice any difference in handling? Obviously this is also very dependent on the tyre.
Do you mean the width or the diameter of the wheel? Diameter and width are totally independent of each other. Increase the tyre width only (assuming it fits on the rim) and the tyre height (and therefore total wheel diameter) will increase unless you go to a lower profile tyre.

Apox

Yeah I meant the total diameter of the wheel, with the tire on, like I said, I'm a noob when it comes to this

It turned out to fit just as well as the old one when it came to the diameter, so no issue. I guess with the 18" wheels I got less rubber on the tires, but same diameter total.

Handling is great, but I'm guessing it's partially because the old ones were rock hard and cracking, plus they were worn down so you could see the white thread inside. The new Continentals are awesome. Also my left turning tendency has disappeared. With the old tires on, if I let the steeringwheel go, the car would cross lanes in 2-3 seconds, it was really bad.

tw2

When you increase the size of the rim you need the outside diameter of the whole wheel (with tyre) to be roughly the same size so your speed and acceleration are the same and the wheel actually fits in the wheel well. Bigger rim requires shorter tyre.

Numbers on tyres are 225/40/17 the middle one is basically a ratio of the width of the tyre which indicates the approx height of the tyre. Just for example the height of the tyre itself is very similar with 245/35/17 and 225/40/17 because despite the 245 being wider the lower ratio (profile) means it will be around about the same height. Same thing with rim size increase. Going from a 17" wheel with 225/40/17 to an 18" wheel would probably use a tyre like 225/35/18 to maintain the same wheel (with tyre) diameter.

You need to update your signature now.

RMACH

I just put a new set of 18's on mine and I originally had 235/40's in the front which rubbed with 10mm spacers so I had to buy a new pair of 225/40's. I rub with 255/35's in the rear with 10mm spacers alot. So I had to take out the spacers in the rear so im only running spacers in the front. I wonder if anyone has rolled there fenders on here before so i can run the rear spacer.

Nice wheels btw!

LuisC55AMG

I would like to install those on my C55 as well. Gives a more modern look to the W203. Do you guys know if I need to apply the same spacers as the ones used by the OP?

AMG Sleeper

They look really nice! I almost got those wheels before settling on these (plus I love the gunmetal, such a nice color match).

What's next, have you considered converting the fogs to HIDs?

southland

What are those black rims on your car in the picture? Can you post a side pic?