235/70R16 vs 245/70R16 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

235/70R16: 28.95″ (735 mm) tall, 9.25″ (235 mm) wide, sidewall 6.48″ (165 mm) — 697 revolutions per mile.

Within the usual 3% rule

+1.90% diameter

Most fitment guides accept up to 3%. Check clearance at full lock and full suspension compression before committing.

  • 10 mm wider: check inner clearance and that your rims are wide enough.

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Measurement235/70R16245/70R16Diff%
Overall diameter28.95″735 mm29.50″749 mm+0.55″+1.9%
Section width235.0 mm245.0 mm+10.0 mm+4.3%
Sidewall height164.5 mm171.5 mm+7.0 mm+4.3%
Rim diameter16″16″0″0.0%
Circumference90.96″2310 mm92.69″2354 mm+1.73″+1.9%
Revolutions per mileturns per distance; drives the odometer697433 /km684425 /km−13−1.9%
Ride height change——+0.28″ +7.0 mm

Speedometer reading

Speedo shows
60mph
97 km/h
Actual speed
61.1mph
98 km/h

Overlay

235/70R16245/70R16

Plus sizing: 235/70R16 on smaller or bigger wheels

Sizes fitted to cars that keep the overall diameter within 3% of 235/70R16 on a rim one inch smaller or up to two inches bigger, closest first.

RimSizeDiameterChangeCompare
R15 (−1) 235/75R15 28.88″ −0.3% Compare
255/70R15 29.06″ +0.4% Compare
R17 (+1) 235/65R17 29.03″ +0.3% Compare
255/60R17 29.05″ +0.3% Compare
R18 (+2) 235/60R18 29.10″ +0.5% Compare
255/55R18 29.04″ +0.3% 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 235/70R16