Jack_88

I am looking at replacing the factory runflats on my C300, but am trying to decide whether or not to stick to the standard setup or try different sized tires.

Is there a good reason Mercedes uses the 225 front/245 rear setup? Anything wrong with going to 245's or even 255's all around? I'd like a bit meatier tires just for handling, but I'm not sure if that will present any issues or drawbacks.

dtd

How many thousand miles do you have on the tires? Are they Continental tires? I have the same question like you? But i would stick with the current setup.

Jack_88

They are the factory Continentals and I have 600 miles on them, they are essentially brand new.

dtd

Wow, why do you plan to replace the stock tires? I have almost 18K miles on my C300 MY17. I'm happy with them, I just don't know how long they would last. I hope they would last up to 40K miles if possible.The only thing I don't like about the staggered tires is, you can't rotate them.

Jack_88

I seem to be getting a lot of road noise and it seems like the ride is almost harsh over certain kinds of bumps.

Mikey53

non-runflats will resolve those issues. I’d suggest staying with the OEM size staggered setup.

dtd

It's strange, my C has standard suspension only, and I don't have noise issue with these Continental tires. I'm in San Jose, Ca and the roads around here are not always perfect. Anyway, my next set of tires would be Michelin and I would use the same staggered setup.

ygmn

With staggered tires since you do not rotate the tire manufacturer tread life warranty is HALF the normal amount.
SO if they list tires as 50K miles for you they would be 25K.

This is something to think about but not critical.

Also when you have staggered normally the rear wheel is wider so going to narrower tires can be a problem so all wheel sizes need to be checked if changing tire size

rustybear3

This is why I prefer non staggered over staggered tires. Tire wear.

C300AWD

Running 245 fronts and 275 on the backs 👍🏻

Jack_88

Oh, wow, so no issues with needing spacers to avoid rub or anything like that?

C300AWD

no rubbing at all! 8.5 fronts 9.5 backs

Jack_88

Any idea what the offset is on those aftermarket wheels?

Dimitrius

I ran 19x8.5 et35 with 245/35/19 square and loved it, car handles much nicer.

C300AWD

Here are the full specs.
Fronts: 19x8.5 offset: 42mm
Backs: 19x9.5 offset: 48mm
Tires are 245x35 fronts 275x35 rear

Jack_88

Thank you, I appreciate it!