Porsche 918 tire and wheel sizes
The Porsche 918 was approved in Switzerland between 2014 and 2015 with tires from 265/35R20 to 325/30R21 on 20″, 21″ wheels. The most common sizes are 265/35R20, 325/30R21. Some versions use different sizes front and rear (staggered fitment).
Sizes differ by engine, trim and market. Confirm with the tire placard (usually on the driver's door jamb), the owner's manual or the vehicle registration papers before buying tires or wheels.
Most common sizes
Porsche 918 Spyder (2014–2015) type 918
5 approved versions, e.g. 918 Spyder WP, 918 Spyder.
How to read this table
Rim and offset uses the European notation: 7Jx17 ET45 is a 7-inch wide, 17-inch diameter wheel with a 45 mm offset. "Versions" is how many approved versions list that size — a rough guide to how common it is. Load / speed is the most frequent service description (for example 91V) among them; your car may require a higher one.
Showing 5 of 5 approvals: rare special versions are left out to keep the page readable. Records were read from the German-language text and checked against the French text; 100 % matched exactly.
Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.