SidewallerTire & wheel calculators

265/45R20 vs 265/50R19

265/50R19 is 0.1% taller (+0.04 in) and the same width than 265/45R20.

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265/50R19 is 0.1% taller than 265/45R20. That is inside the ±3% most shops treat as a straight swap.

265/45R20265/50R19Change
Diameter29.39″29.43″+0.04″+0.1%
Width10.43″10.43″0.00″0.0%
Sidewall4.69″5.22″+0.52″+11.1%
Circumference92.3″92.5″+0.1″+0.1%
Wheel20″19″−1″
Revs per mile686685−1
SideTread
265/45R20265/50R19
Speedometer shows 60 mph60.1mph

Real speed on 265/50R19.

Ground clearance+0.02in

Change in height under the axle.

Width per side0.00in

On the same wheel, split inboard and outboard.

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265/45R20 or 265/50R19?

Can I use 265/50R19 instead of 265/45R20?

265/50R19 is 0.1% taller than 265/45R20. 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 265/50R19 you are really doing 60.1 mph if the speedometer was set up for 265/45R20. Going the other way, 265/45R20 would make it read 59.9 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.02 in (+1 mm) under the axle.

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