235/70R16 vs 215/70R16 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

Outside the 3% rule

−3.81% diameter

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

  • 20 mm narrower: check the tire is approved for your rim width.

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

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Measurement235/70R16215/70R16Diff%
Overall diameter28.95″735 mm27.85″707 mm−1.10″−3.8%
Section width235.0 mm215.0 mm−20.0 mm−8.5%
Sidewall height164.5 mm150.5 mm−14.0 mm−8.5%
Rim diameter16″16″0″0.0%
Circumference90.96″2310 mm87.49″2222 mm−3.46″−3.8%
Revolutions per mileturns per distance; drives the odometer697433 /km724450 /km+28+4.0%
Ride height change——−0.55″ −14.0 mm

Speedometer reading

Speedo shows
60mph
97 km/h
Actual speed
57.7mph
93 km/h

Overlay

235/70R16215/70R16

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.

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