SidewallerTire & wheel calculators

235/40R19 vs 235/45R19

235/45R19 is 3.5% taller (+0.93 in) and the same width than 235/40R19.

Caution
Check before you buy

235/45R19 is 3.5% taller than 235/40R19. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.

235/40R19235/45R19Change
Diameter26.40″27.33″+0.93″+3.5%
Width9.25″9.25″0.00″0.0%
Sidewall3.70″4.16″+0.46″+12.5%
Circumference82.9″85.8″+2.9″+3.5%
Wheel19″19″Same
Revs per mile764738−26
SideTread
235/40R19235/45R19
Speedometer shows 60 mph62.1mph

Real speed on 235/45R19.

Ground clearance+0.46in

Change in height under the axle.

Width per side0.00in

On the same wheel, split inboard and outboard.

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235/40R19 or 235/45R19?

Can I use 235/45R19 instead of 235/40R19?

235/45R19 is 3.5% taller than 235/40R19. 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 235/45R19 you are really doing 62.1 mph if the speedometer was set up for 235/40R19. Going the other way, 235/40R19 would make it read 58.0 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.46 in (+12 mm) under the axle.

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