SidewallerTire & wheel calculators

275/40R19 vs 235/50R19

235/50R19 is 2.1% taller (+0.59 in) and 1.57 in narrower than 275/40R19.

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235/50R19 is 2.1% taller than 275/40R19. That is inside the ±3% most shops treat as a straight swap.

275/40R19235/50R19Change
Diameter27.66″28.25″+0.59″+2.1%
Width10.83″9.25″−1.57″−14.5%
Sidewall4.33″4.63″+0.30″+6.8%
Circumference86.9″88.8″+1.9″+2.1%
Wheel19″19″Same
Revs per mile729714−15
SideTread
275/40R19235/50R19
Speedometer shows 60 mph61.3mph

Real speed on 235/50R19.

Ground clearance+0.30in

Change in height under the axle.

Width per side−0.79in

On the same wheel, split inboard and outboard.

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275/40R19 or 235/50R19?

Can I use 235/50R19 instead of 275/40R19?

235/50R19 is 2.1% taller than 275/40R19. 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 235/50R19 you are really doing 61.3 mph if the speedometer was set up for 275/40R19. Going the other way, 275/40R19 would make it read 58.7 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.30 in (+8 mm) under the axle.

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