SidewallerTire & wheel calculators

255/50R19 vs 255/70R15

255/70R15 is 0.1% taller (+0.02 in) and the same width than 255/50R19.

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Close match

255/70R15 is 0.1% taller than 255/50R19. That is inside the ±3% most shops treat as a straight swap.

255/50R19255/70R15Change
Diameter29.04″29.06″+0.02″+0.1%
Width10.04″10.04″0.00″0.0%
Sidewall5.02″7.03″+2.01″+40.0%
Circumference91.2″91.3″+0.0″+0.1%
Wheel19″15″−4″
Revs per mile695694−0
SideTread
255/50R19255/70R15
Speedometer shows 60 mph60.0mph

Real speed on 255/70R15.

Ground clearance+0.01in

Change in height under the axle.

Width per side0.00in

On the same wheel, split inboard and outboard.

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255/50R19 or 255/70R15?

Can I use 255/70R15 instead of 255/50R19?

255/70R15 is 0.1% taller than 255/50R19. That is inside the ±3% most shops treat as a straight swap. 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 255/70R15 you are really doing 60.0 mph if the speedometer was set up for 255/50R19. Going the other way, 255/50R19 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.

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