NGS_E55

These would be coming off my 18x9.5" M5 wheels. TIA

Jrocket

Maybe Jangy will chime in,but I think some have ran as high as 295's on the rear.I think Jangy has tried the most tire combos,could be wrong though.

FlyByNight

Just put 275/35/18s on my stock wheels no problem. And really, if you think about it, its only 3/8" larger than the stock tires... no big deal.

That's also the size BFG drag radials many people throw on their stock wheels when they go to the track... so that size is tried and true....

NGS_E55

Thanks for quick reply, I'll PM him

jangy

275s are easy on those rims. You can even run the 275s on those rims and put them on the front. Get an extra set fro the reaqr, and run 275s all around. it is fun.
I would keep the 295s to a 9.5" minimum. I don't mind a little play in the back, since the added grip never hurts.

Rafal

No problem. I used 275/35/18 PS2 on stock rear twin spokes. It is a natural choice.
Dont forget that the stock Conti2 265/35/18 are actually undersized as compared to the front 245/40/18.

derrick_lui

okay...how about 285's in the rears then...?

WayneE

I have 285 Nittos on my stock rears.

komp55

This issue has been discussed more than once. The "Search" function is your friend, and it's a smart idea to use it sometimes before asking FAQs about tires, exhausts, pulleys, etc. Since our cars have already gone out of production (W211 E55), most everything there is to discuss about them has already been covered at least once. Here's a link to a recent discussion covering the same topic:

https://mbworld.org/forums/w211-amg/170403-275-35-18-s-rear.html