Bigger tires? Where do they make a difference
I have a 2012 Ford F-350. According to the sticker on my frame the tires (LT 245 75 R17E) have certain weight ratings......I have LT 275 70 R18E tires on my truck. Due to the bigger tires, does this...
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The 245/75R17 is the stock size tire on the F250 and the 275/70R18 is on the F350. The 18" wheel is optional on the F250, but you will not see the ratings sticker change due to the GVWR limit on F250's Class 2B. The Sterling 10.5" used in the F250 and SRW F350 is rated for 9750 lbs, so suspension and wheels are the limiters to having a higher sticker rating if the class limits are ignored.
Was your F350 one of the ones with a down rated GVWR of 10K lbs? Other than a DRW, I have not seen 17's on a F350.
My 6.0 PSD felt little difference between the 17's and 18's when at 19K lbs GCW when on flats. I did find downshifts were earlier and longer on grades by one gear in the 5R110, but the truck never struggled to keep desired speed even when climbing at elevation.
Was your F350 one of the ones with a down rated GVWR of 10K lbs? Other than a DRW, I have not seen 17's on a F350.
My 6.0 PSD felt little difference between the 17's and 18's when at 19K lbs GCW when on flats. I did find downshifts were earlier and longer on grades by one gear in the 5R110, but the truck never struggled to keep desired speed even when climbing at elevation.
