Tire Size Box

315/60R19 vs 315/65R19

315/65R19 compared with 315/60R19

+3.7% diameter, 0.0" width

315/65R19 is 35.12" tall vs 33.88". More than the 3% rule of thumb, so check carefully before switching.

33.9"19" rim7.4"12.4" wide
315/60R19 (solid) compared with 315/65R19 (dashed outline), drawn to scale

With 315/65R19 tires, when your speedometer says 60 mph you are really going

62.2 mph

315/65R19 is +1.24 inches (+3.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

315/60R19315/65R19Difference%
Overall diameter33.88"35.12"+1.24"+3.7%
Section width12.40"12.40"0.00"0.0%
Sidewall height7.44"8.06"+0.62"+8.3%
Circumference106.44"110.34"+3.90"+3.7%
Revolutions per mile595.2574.2−21.0−3.5%

Speedometer difference

If your vehicle came with 315/60R19 and you fit 315/65R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.1 mph+1.1 mph
40 mph41.5 mph+1.5 mph
50 mph51.8 mph+1.8 mph
60 mph62.2 mph+2.2 mph
65 mph67.4 mph+2.4 mph
70 mph72.6 mph+2.6 mph
75 mph77.7 mph+2.7 mph
80 mph82.9 mph+2.9 mph

Each size on its own

Questions

Which is bigger, 315/60R19 or 315/65R19?
315/65R19 is taller by 1.24 inches (35.12" vs 33.88"). 315/60R19 is the same width.
Can I replace 315/60R19 with 315/65R19?
It is not recommended without checking carefully. The diameter difference is +3.7%, 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 315/65R19 change my speedometer?
When your speedometer reads 60 mph with 315/65R19 fitted (calibrated for 315/60R19), your real speed is 62.2 mph. Your odometer will under-count miles by about 3.7%.
Will 315/65R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.62 inches of ground clearance at the axle.

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