Can anyone advise me on the following combinations:
255/40/17 on a 7.5" rim or
245/40/17 on a 7.5" rim.
I've got the 255 mounted on the rim fine I'm just not too sure if there may be problems with the sidewalls. I've mounted them on my 124 and have enough clearance to avoid rubbing. I know, I should have at least an 8" for these. But hey, they're free so why not? The wheels are 17x7.5 et35 Monoblocks from a 97 E420. They are actually 202 wheels. Both of the above tires are Michelin Pilot Sports.
I would like to put the 255 to rear and 245 to front. Either this, or wear 235/45 Goodyear Eagle F1 , which I'm trying to avoid.
Would this be unsafe? Anyone ever try fitments like this? Any advice is really appreciated.

Thanks,
Bill
91 300E

In the german tires/rims catalog I have only seen 225/45/17 wide tire in front and 245/40/17 in the rear. For combi/wagons is only recomended 215/45/17 wide both front and rear.

Regards Patrik

Agreed, you're putting way to much uneven stress on the sidewall. The tire will not sit properly on the rim.

255 on a 7,5J rim...that ought to give you a nervous ride in high speed corners...I don't think that this combination will work out fine...
235 on a 7,5J rim is about the max. width I think...

greetingz,

not on a car I would get in ... sidewall flexing would be extreme and the heat created could cause the tire to fail in other words BOOOM!!!! it is a vary bad idea

245 front 255 rear
 

ive never heard or seen anyone with 245 series in front
and 255 series in rear on a W124. and u say u dont have
a problems with any kind of rubbing??? is the car lowered at all??? id like to put 235/40/18 on 18"x8" wheels all around on my 95 E320 but am scared they will rub. ive been told to go with 225's max. does anyone know the max width u can go with on a W124???