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Tire size

295/45R20 tire size: dimensions explained

Factory size on the Porsche Cayenne (9YA facelift). Below are the dimensions calculated from the size marking itself. Your vehicle's correct size, load index and speed rating are on the placard in the driver's door jamb; check it before buying.

MeasurementMetricImperial
Section width295 mm11.61 in
Sidewall height132.8 mm5.23 in
Overall diameter773.5 mm30.45 in
Wheel diameter508.0 mm20 in
Circumference2431 mm95.7 in
Revolutions per mile662

Calculated values: diameter = wheel + 2 × (width × aspect ratio). Real tires vary slightly by brand and model.

Reading the marking

295 is the section width in millimetres, 45 is the sidewall height as a percentage of that width, R means radial construction, and 20 is the wheel diameter in inches. A passenger (P or Euro-metric) tire and an LT tire in the same size are not interchangeable without checking load requirements.

Compare 295/45R20 with another size →

295/45R20 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Radar Dimax AS-8
Grand Touring All-Season		XL 114W$180.08View at Tire Rack
Toyo Proxes ST III
Street/Sport Truck All-Season Truck		XL 114V$212.10View at Tire Rack

Highway / touring

TireLoad/speedPrice per tire
Advanta SVT Plus
Crossover/SUV Touring All-Season		XL 114V$180.22View at Tire Rack
Advanta SVT-01
Crossover/SUV Touring All-Season		XL 114V$180.56View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Pirelli P Zero (PZ4)
Max Performance Summer		XL 114Y$708.68View at Tire Rack

Winter

TireLoad/speedPrice per tire
Pirelli Scorpion Winter
Light Truck/SUV Performance Snow Truck		XL 114V$495.90View at Tire Rack
Michelin Pilot Alpin 5 SUV
Light Truck/SUV Performance Snow Truck		XL 114V$511.39View at Tire Rack

Showing the lowest-priced in-stock options in each category from 16 295/45R20 tires in Tire Rack's feed, sorted by price only. We don't rank by commission. Match or exceed the load index and speed rating on your placard.

Affiliate links: if you buy through a Tire Rack link, RightTread may earn a commission through CJ. It doesn't change your price. Prices are Tire Rack's per-tire prices from Tire Rack's product feed as of Nov 7, 2026, 9:19 PM PT. Prices change, so confirm on Tire Rack before you buy. Disclosure

Other sizes