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Tire size

235/55R20 tire size: dimensions explained

Factory size on the Porsche Macan Electric. 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 width235 mm9.25 in
Sidewall height129.3 mm5.09 in
Overall diameter766.5 mm30.18 in
Wheel diameter508.0 mm20 in
Circumference2408 mm94.8 in
Revolutions per mile668

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

Reading the marking

235 is the section width in millimetres, 55 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 235/55R20 with another size →

235/55R20 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Radar Dimax AS-8
Grand Touring All-Season		XL 105W$145.31View at Tire Rack
Toyo Celsius Sport
Grand Touring All-Season		102V$157.07View at Tire Rack

Highway / touring

TireLoad/speedPrice per tire
Advanta SVT Plus
Crossover/SUV Touring All-Season		102V$156.98View at Tire Rack
Sumitomo HTR Enhance CX2
Crossover/SUV Touring All-Season		102H$191.99View at Tire Rack

All-terrain

TireLoad/speedPrice per tire
Radar Renegade A/T Trail
On-Road All-Terrain		XL 105V$159.86View at Tire Rack
Falken WildPeak A/T Trail
On-Road All-Terrain		102V$230.00View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Bridgestone Potenza Sport
Max Performance Summer		XL 105Y$172.35View at Tire Rack
Bridgestone Potenza Sport
Max Performance Summer		XL 105Y$405.99View at Tire Rack

Winter

TireLoad/speedPrice per tire
Bridgestone Blizzak DM-V2
Light Truck/SUV Studless Ice & Snow Truck		102T$208.02View at Tire Rack
Continental VikingContact 8
Studless Ice & Snow		XL 105H$229.99View at Tire Rack

Showing the lowest-priced in-stock options in each category from 84 235/55R20 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