285/30R24 vs 33x13.50R24 tire size comparison

Change either size and everything below updates.

Start from your car make, model, year

Make Model Year

Width/AspectRRim

DiameterxWidthRRim

Width/AspectRRim

DiameterxWidthRRim

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

+7.38% diameter

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

58 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.

Tires in 33x13.50R24

Check price on Amazon · 33x13.50R24 Best-rated 33x13.50R24 tires

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Measurement	285/30R24	33x13.50R24	Diff	%
Overall diameter	30.73″781 mm	33.00″838 mm	+2.27″	+7.4%
Section width	285.0 mm	342.9 mm	+57.9 mm	+20.3%
Sidewall height	85.5 mm	114.3 mm	+28.8 mm	+33.7%
Rim diameter	24″	24″	0″	0.0%
Circumference	96.55″2452 mm	103.67″2633 mm	+7.12″	+7.4%
Revolutions per mileturns per distance; drives the odometer	656408 /km	611380 /km	−45	−6.9%
Ride height change	—	—	+1.13″ +28.8 mm

Speedometer reading

Speedo shows

60mph

97 km/h

Actual speed

64.4mph

104 km/h

Overlay

285/30R2433x13.50R24

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.