135/70R15 vs 135/50R17 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

135/70R15: 22.44″ (570 mm) tall, 5.31″ (135 mm) wide, sidewall 3.72″ (95 mm) — 899 revolutions per mile.

Well within tolerance

−0.56% diameter

The overall diameter changes by less than 1.5%, so speedometer error is negligible and ride height barely moves.

  • Needs 17″ wheels: this tire does not fit your 15″ rims.

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Measurement135/70R15135/50R17Diff%
Overall diameter22.44″570 mm22.31″567 mm−0.13″−0.6%
Section width135.0 mm135.0 mm0.0 mm0.0%
Sidewall height94.5 mm67.5 mm−27.0 mm−28.6%
Rim diameter15″17″+2″+13.3%
Circumference70.50″1791 mm70.10″1781 mm−0.40″−0.6%
Revolutions per mileturns per distance; drives the odometer899558 /km904562 /km+5+0.6%
Ride height change——−0.06″ −1.6 mm

Speedometer reading

Speedo shows
60mph
97 km/h
Actual speed
59.7mph
96 km/h

Overlay

135/70R15135/50R17

Plus sizing: 135/70R15 on smaller or bigger wheels

Sizes fitted to cars that keep the overall diameter within 3% of 135/70R15 on a rim one inch smaller or up to two inches bigger, closest first.

RimSizeDiameterChangeCompare
R14 (−1) 165/65R14 22.44″ 0.0% Compare
155/70R14 22.54″ +0.5% Compare
R16 (+1) 165/50R16 22.50″ +0.2% Compare
145/55R16 22.28″ −0.7% Compare
R17 (+2) 135/50R17 22.31″ −0.6% Compare
155/45R17 22.49″ +0.2% 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 →