1990 Chevrolet K1500 4wd Pick-up Bolt Pattern

Bolt Pattern
6x139.7mm = 6x5.5 inches
Tire Sizes
225/75R16 = 29.3x8.9R16

The 1990 Chevrolet K1500 4wd Pick-up 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.