Mercedes-Benz G-Class 2007 Owners Manual - Manual (Page 419)

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Technical data
Rims and tires
Spare wheel
Model G 500 G 55 AMG
Rim (light alloy) 7.5 J x 18 H2 7.5 J x 18 H2
Wheel offset 1.69 in (43 mm) 1.69 in (43 mm)
All season tire 1
1 Radial-ply tire
265/60 R18 110V M+S 265/60 R18 110V M+S