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2025 GMC Spider Italia tire sizes

The 2025 GMC Spider Italia came from the factory with 1 tire size on 18" wheels. The most common size is 265/65 R18.

2025 Spider Italia Canyon AT4

Factory (OE) sizes

18"wheels
265/65 R18

How to read 265/65 R18

265
Tread width in millimetres
65
Sidewall height, % of width
R
Radial construction
18
Wheel diameter in inches

Overall diameter: about 31.6" · Sidewall: 172 mm

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