285/45R19 vs 235/60R18

235/60R18 is 0.0% taller (+0.00 in) and 1.97 in narrower than 285/45R19.

Same height

235/60R18 and 285/45R19 are the same overall diameter, so the speedometer stays accurate.

	285/45R19	235/60R18	Change
Diameter	29.10″	29.10″	+0.00″+0.0%
Width	11.22″	9.25″	−1.97″−17.5%
Sidewall	5.05″	5.55″	+0.50″+9.9%
Circumference	91.4″	91.4″	+0.0″+0.0%
Wheel	19″	18″	−1″
Revs per mile	693	693	−0

285/45R19235/60R18

Change sizes Speedometer table Gearing

Speedometer shows 60 mph60.0mph

Real speed on 235/60R18.

Ground clearance+0.00in

Change in height under the axle.

Width per side−0.98in

On the same wheel, split inboard and outboard.

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285/45R19 or 235/60R18?

Can I use 235/60R18 instead of 285/45R19?

235/60R18 and 285/45R19 are the same overall diameter, so the speedometer stays accurate. 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 235/60R18 you are really doing 60.0 mph if the speedometer was set up for 285/45R19. Going the other way, 285/45R19 would make it read 60.0 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.00 in (+0 mm) under the axle.

Other comparisons

225/55R19 vs 285/45R19 235/50R19 vs 285/45R19 285/45R19 vs 235/55R19 245/50R19 vs 285/45R19 255/50R19 vs 285/45R19 285/45R19 vs 255/55R19 285/45R19 vs 265/50R19 275/45R19 vs 285/45R19 285/45R19 vs 295/35R21 255/70R15 vs 285/45R19 255/65R16 vs 285/45R19 225/60R18 vs 235/60R18 235/55R18 vs 235/60R18 255/55R18 vs 235/60R18 235/60R18 vs 245/60R18 235/60R18 vs 235/65R18 235/60R18 vs 255/60R18 225/55R18 vs 235/60R18