1984 GMC C20 Pick-up 2wd Bolt Pattern


Bolt Pattern
6x139.7mm = 6x5.5 inches
Tire Sizes
Option 1
215/85R16 = 30.4x8.5R16
Option 2
235/85R16 = 31.7x9.3R16

The 1984 GMC C20 Pick-up 2wd bolt pattern is 6-139.7 mm. This means there are 6 lugs and the diameter of the circle that the lugs make up measures 139.7 mm or 5.5 inches across. To get a close measurement of your 6 lug bolt pattern without a bolt pattern tool you should measure from the center of one lug to the center of the lug across from it.