SidewallerTire & wheel calculators

255/45R19 vs 255/50R19

255/50R19 is 3.6% taller (+1.00 in) and the same width than 255/45R19.

Caution
Check before you buy

255/50R19 is 3.6% taller than 255/45R19. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.

255/45R19255/50R19Change
Diameter28.04″29.04″+1.00″+3.6%
Width10.04″10.04″0.00″0.0%
Sidewall4.52″5.02″+0.50″+11.1%
Circumference88.1″91.2″+3.2″+3.6%
Wheel19″19″Same
Revs per mile719695−25
SideTread
255/45R19255/50R19
Speedometer shows 60 mph62.1mph

Real speed on 255/50R19.

Ground clearance+0.50in

Change in height under the axle.

Width per side0.00in

On the same wheel, split inboard and outboard.

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255/45R19 or 255/50R19?

Can I use 255/50R19 instead of 255/45R19?

255/50R19 is 3.6% taller than 255/45R19. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock. 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 255/50R19 you are really doing 62.1 mph if the speedometer was set up for 255/45R19. Going the other way, 255/45R19 would make it read 57.9 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.50 in (+13 mm) under the axle.

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