I run a 285/75/R17 on my 73 W200 and am very happy with it. I do have a 4" lift and could easily fit a bigger tire but the truck performs really well with the tall skinny tire and aluminum rims. With that tire size there is plenty of sidewall when using the 17" rim and I think it looks right.

-Jon

PW on 17s small.jpg
70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah 71 valiant scamp 318/A833OD/AC/PS 00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process 73 W200 Power wagon, PTO winch, 4 spd