Tire Size Box

215/75R13 vs 235/75R13

235/75R13 compared with 215/75R13

+4.6% diameter, +0.8" width

235/75R13 is 26.88" tall vs 25.70". More than the 3% rule of thumb, so check carefully before switching.

25.7"13" rim6.3"8.5" wide
215/75R13 (solid) compared with 235/75R13 (dashed outline), drawn to scale

With 235/75R13 tires, when your speedometer says 60 mph you are really going

62.8 mph

235/75R13 is +1.18 inches (+4.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

215/75R13235/75R13Difference%
Overall diameter25.70"26.88"+1.18"+4.6%
Section width8.46"9.25"+0.79"+9.3%
Sidewall height6.35"6.94"+0.59"+9.3%
Circumference80.73"84.44"+3.71"+4.6%
Revolutions per mile784.8750.4−34.5−4.4%

Speedometer difference

If your vehicle came with 215/75R13 and you fit 235/75R13, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.9 mph+0.9 mph
30 mph31.4 mph+1.4 mph
40 mph41.8 mph+1.8 mph
50 mph52.3 mph+2.3 mph
60 mph62.8 mph+2.8 mph
65 mph68.0 mph+3.0 mph
70 mph73.2 mph+3.2 mph
75 mph78.4 mph+3.4 mph
80 mph83.7 mph+3.7 mph

Each size on its own

Questions

Which is bigger, 215/75R13 or 235/75R13?
235/75R13 is taller by 1.18 inches (26.88" vs 25.70"). 235/75R13 is wider by 0.79 inches.
Can I replace 215/75R13 with 235/75R13?
It is not recommended without checking carefully. The diameter difference is +4.6%, more than the 3% most shops and makers allow. It will throw off the speedometer and may affect ABS, stability control and clearance.
How much will 235/75R13 change my speedometer?
When your speedometer reads 60 mph with 235/75R13 fitted (calibrated for 215/75R13), your real speed is 62.8 mph. Your odometer will under-count miles by about 4.6%.
Will 235/75R13 lift my vehicle?
Ride height changes by half the diameter difference: +0.59 inches of ground clearance at the axle.

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