Chevrolet K20 Spare Tire Sizes

The Chevrolet K20 has used a 8x6.5" bolt pattern for all models from 1978 to 1987 along with tire diameters ranging from 28.6" to 31.8" tall. Using a temporary spare tire with a diameter close to the standard tire has many benefits, especially for modern vehicle applications. Tire diameter as well as wheel diameter clearance have been taken into account for the specific Chevrolet K20 years and options. In this case, using a non-temporary Full-Size tire as your spare, is the recommendation for all applications.

YearMakeModelBolt
Pattern
Tire
Diameters
Recommended
Spare
1987ChevroletK20
8-165
30.4-31.7"
Full Size
1986ChevroletK20
8-165
30.4-31.7"
Full Size
1985ChevroletK20
8-165
30.4-31.7"
Full Size
1984ChevroletK20
8-165
30.4-31.7"
Full Size
1983ChevroletK20
8-165
30.4-31.7"
Full Size
1982ChevroletK20
8-165
30.4-31.7"
Full Size
1981ChevroletK20
8-165
29.5-31.8"
Full Size
1980ChevroletK20
8-165
29.5-31.8"
Full Size
1979ChevroletK20
8-165
28.6-31.8"
Full Size
1978ChevroletK20
8-165
28.6-31.8"
Full Size
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