Raf Jan

Hey guys, need help with tire sizes. Just purchased 20” wheels for my 2012 CLS550 original tires are 255/35/19 Front and 285/30/19 back. The new rims are 20” and the offsets are 20 Front and 25 at the back. What size of tires should I use for those offsets? I don’t what the tires to rub the fender. Thank you

mjohn50n

Wheel size is needed

Raf Jan

Wheels are 20” with 20 and 25 offset.

mjohn50n

What is the width of the wheels? offset doesnt really matter

Raf Jan

Wheels are 9 and 10 but I was at the shop I might go with 255/30 and 275/30. If I go higher the wheels are gonna stick out because of the offset.

mjohn50n

255/30/20 front 285/25/20 rear, you will maintain the stock setup

Rehabguy

Actually, Offset matters very much. I don't know what the exact offset is for the CLS OE wheels, but I am pretty sure that they are NOT as low as +20. The further out you are pushing your wheels / lower the offset you wanna go with, the more stretch you'll be require to have on your tires to allow the set up to mount on your car.... unless you are modding your fenders. A 255 width tire will mount just fine on a 9" width wheel. However, if you push the wheel out by 15mm, it MAY rub on the inside of the fender.

threeMBs

To maintain 100% stock diameter when going from 19" to 20", one should go 255/30 front and 295/25 rear. However, on 10" et25 wheels, 295 will slightly poke, so 285/25 will be rubbing free as was suggested above.

Due to wider front fenders (as compared to already wide fender of non-AMG C218, and to relatively wide W212 E63 front fenders), CLS63 can take even lower front offset than et20 and/or even wider front tires without rubbing (generally speaking, does not really apply to OP since he's limited on front by rear's offset).

mjohn50n

offset will only be hindered if the sidewall is to large there by causing the tire to rub on the strut. Just my 2 cents

Rehabguy

Offset in a wheel will determine how far IN or OUT IT will sit in relation to the fender and the strut. Draw your own conclusions.

Raf Jan

I got 255/35/20 F and 275/30/20 at the back. Here are some pictures how the car looks.

Rehabguy

Fitment looks good! How does she handle? How are you liking how she drives now?

mjohn50n

Personally I think the side walls are too tall would have went with a 30 and 25 series, but as long as you're happy thats al that matters.