255/55R19 vs 255/70R16
255/70R16 is 0.0% taller (+0.01 in) and the same width than 255/55R19.
255/70R16 and 255/55R19 are the same overall diameter, so the speedometer stays accurate.
Real speed on 255/70R16.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 255/70R16 tires
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255/55R19 or 255/70R16?
Can I use 255/70R16 instead of 255/55R19?
255/70R16 and 255/55R19 are the same overall diameter, so the speedometer stays accurate. Also match or beat the original load index and speed rating, and check that the wheel width suits the new tire.
Will my speedometer be off?
At an indicated 60 mph on 255/70R16 you are really doing 60.0 mph if the speedometer was set up for 255/55R19. Going the other way, 255/55R19 would make it read 60.0 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.01 in (+0 mm) under the axle.