GMC K20 Spare Tires

The GMC K20 used a 8x6.5" (8x165.1 mm) bolt pattern for all models from 1973 to 1989 along with tire diameters ranging from 28.6" to 31.8" tall. Using a temporary compact spare tire with a diameter close to the standard tire has many benefits, especially for modern vehicle applications.


The tire diameter and the wheel diameter clearance have been taken into account for the specific GMC K20 years and options. In this case, it's recommended to use a Full-Size tire similar to the tires currently on your vehicle as your spare. We've provided a breakdown by vehicle generation and model specifics to help you find the correct GMC K20 spare tire.

1989-1989 GMC K20 Spare Tires

This generation of the GMC K20 began in 1989 and was available through 1989. All the models for these years use the same spare tire and wheel solution.

Slide Table to See More
YearMakeModelBolt
Pattern		Tire
Diameters		Recommended
Spare Tire
1989GMCK20 V2500
8x6.5"
30.4-31.7"
Full Size

1987-1988 GMC K20 Spare Tires

This generation of the GMC K20 began in 1987 and was available through 1988. All the models for these years use the same spare tire and wheel solution.

Slide Table to See More
YearMakeModelBolt
Pattern		Tire
Diameters		Recommended
Spare Tire
1988GMCK20 V20
8x6.5"
30.4-31.7"
Full Size
1987GMCK20 V20
8x6.5"
30.4-31.7"
Full Size

1973-1987 GMC K20 Spare Tires

This generation of the GMC K20 began in 1973 and was available through 1987. All the models for these years use the same spare tire and wheel solution.

Slide Table to See More
YearMakeModelBolt
Pattern		Tire
Diameters		Recommended
Spare Tire
1987GMCK20
8x6.5"
30.4-31.7"
Full Size
1986GMCK20
8x6.5"
30.4-31.7"
Full Size
1985GMCK20
8x6.5"
30.4-31.7"
Full Size
1984GMCK20
8x6.5"
30.4-31.7"
Full Size
1983GMCK20
8x6.5"
30.4-31.7"
Full Size
1982GMCK20
8x6.5"
30.4-31.7"
Full Size
1981GMCK20
8x6.5"
29.5-31.8"
Full Size
1980GMCK20
8x6.5"
29.5-31.8"
Full Size
1979GMCK20
8x6.5"
28.6-31.8"
Full Size