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Tire size

305/45R22 tire size: dimensions explained

Factory size on the Rivian R1T, Rivian R1S. 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 width305 mm12.01 in
Sidewall height137.3 mm5.4 in
Overall diameter833.3 mm32.81 in
Wheel diameter558.8 mm22 in
Circumference2619 mm103.1 in
Revolutions per mile615

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

Reading the marking

305 is the section width in millimetres, 45 is the sidewall height as a percentage of that width, R means radial construction, and 22 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 305/45R22 with another size →

305/45R22 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Advanta HPZ-02
Ultra High Performance All-Season		XL 118V$184.06View at Tire Rack
Radar Dimax AS-8
Grand Touring All-Season		XL 118V$198.83View at Tire Rack

All-terrain

TireLoad/speedPrice per tire
Radar Renegade A/T Pro
On-Road All-Terrain		XL 118H$267.97View at Tire Rack
Radar Renegade A/T
On-Road All-Terrain		XL 118H$312.50View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Michelin Pilot Sport S 5
Max Performance Summer		XL 118V$610.99View at Tire Rack

Rugged / mud-terrain

TireLoad/speedPrice per tire
Mickey Thompson Baja Boss A/T
Rugged All-Terrain		XL 118T$487.29View at Tire Rack
Nitto Ridge Grappler
Rugged All-Terrain		XL 118Q$489.00View at Tire Rack

Showing the lowest-priced in-stock options in each category from 16 305/45R22 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