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295/35R19 vs 255/35R20 tire size

255/35R20 vs 295/35R19, diameter

-0.4% shorter

Speedometer
60.2 mph
At a true 60 mph
Diameter
27.03 in
Was 27.13 in
Revs per mile
746
Was 743
3% guideline
Within

Car built for 295/35R19, now on 255/35R20.

295/35R19 and 255/35R20

295/35R19 vs 255/35R20 tire size
Measure295/35R19255/35R20Difference
Width, mm295255-40
Sidewall, % of width35350
Rim, in1920+1
Section height, in4.063.51-0.55
Diameter, in27.1327.03-0.10 (-0.4%)
Circumference, in85.284.9-0.3
Revs per mile743746+3 (+0.4%)

Fitting 255/35R20 instead of 295/35R19

Within the usual 3% diameter guideline.

  • Needs 20 in wheels.
  • Shorter sidewall: 0.6 in less.

Cars with 255/35R20

What this cannot tell you

Diameter within 3% is a common shop guideline, not a maker spec.

Load index, offset and clearance are not in this data.

How values are checked