Re: C30 dually rear diff gearing options help please
As far as tires, I had 255/85r-16s on my tow truck. They come in at 33'' tall. Sidewalls did not touch but it was close (about 1/2''). BUT with your 2wd there may be an issue on the front with them rubbing the fenders on a turn. My wrecker was 4x. I see on the spid your truck came with 7.50/16s. A comparable size for those is a 235/85r-16 which will be 31 (ish) in height. some of the duallys came with 215s which really looks stupid.
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