I have a 55 2 door HDTP with the Newman Chassis using a 86 C4 suspension. Per CN calculator it looks as if my wheels and tires I'm leaning towards will fit. On the rear Im still undecided if I want 17 or 18 x 10 7" BS with 275 maybe 285 x 40 x 17 or 18. Will I regret going to 18 on the back and 17 on the front? Is a 285 too much for a 55 as it is I will have to remove the lower shock mount to install either way I go. Front is simpler 17 x 8 6" BS 245 45 17.

Any opinions on the NITTO NT555 G2?

Thanks
Mike