265/35R19 vs 335/30R20 tire size comparison

Change either size and everything below updates.

Start from your car make, model, year
Current tire size
/R
xR
New tire size
/R
xR

Width in mm · aspect = sidewall height as a % of width · rim in inches

Flotation (LT) sizes, all in inches: overall diameter × section width, then rim

265/35R19: 26.30″ (668 mm) tall, 10.43″ (265 mm) wide, sidewall 3.65″ (93 mm) — 767 revolutions per mile.

Outside the 3% rule

+6.12% diameter

This exceeds the tolerance most manufacturers allow. Expect speedometer error, possible rubbing, and on some cars ABS or stability-control faults.

  • Needs 20″ wheels: this tire does not fit your 19″ rims.
  • 70 mm wider: check inner clearance and that your rims are wide enough.

Check what fits your car Factory tire sizes for every make, model and year.

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Measurement265/35R19335/30R20Diff%
Overall diameter26.30″668 mm27.91″709 mm+1.61″+6.1%
Section width265.0 mm335.0 mm+70.0 mm+26.4%
Sidewall height92.8 mm100.5 mm+7.8 mm+8.4%
Rim diameter19″20″+1″+5.3%
Circumference82.63″2099 mm87.69″2227 mm+5.06″+6.1%
Revolutions per mileturns per distance; drives the odometer767476 /km723449 /km−44−5.8%
Ride height change——+0.81″ +20.4 mm

Speedometer reading

Speedo shows
60mph
97 km/h
Actual speed
63.7mph
102 km/h

Overlay

265/35R19335/30R20

Plus sizing: 265/35R19 on smaller or bigger wheels

Sizes fitted to cars that keep the overall diameter within 3% of 265/35R19 on a rim one inch smaller or up to two inches bigger, closest first.

RimSizeDiameterChangeCompare
R18 (−1) 265/40R18 26.35″ +0.2% Compare
235/45R18 26.33″ +0.1% Compare
R20 (+1) 265/30R20 26.26″ −0.2% Compare
275/30R20 26.50″ +0.7% Compare
R21 (+2) 275/25R21 26.41″ +0.4% Compare
245/30R21 26.79″ +1.8% Compare

How to use the tire size calculator

Put your current tire size — width, aspect ratio and rim diameter — into the first form, then your desired size into the second. You’ll get the difference between the new and the old size, plus the speedometer reading difference and your actual speed on the new set. Both metric and flotation (LT inch) sizes are supported.

The calculator helps you decide whether a set of tires and wheels will fit your car. To compare tires by brand and model instead, use our tire comparison tool; to look up factory sizes, browse by car make.

Changing wheels too? The wheel offset calculator shows how far a new wheel width and offset move the tire toward the suspension and the fender.

Reading a tire size

225/45R17
225
Section width in millimetres
45
Aspect ratio — sidewall height as a % of width
R
Radial construction
17
Rim diameter in inches

Full guide to the tire sidewall →

Sizes often compared with 265/35R19