1986 Buick Riviera Base Model Bolt Pattern

Bolt Pattern
5x115mm = 5x4.53 inches
Tire Sizes
Option 1
205/70R14 = 25.3x8.1R14
Option 2
215/60R15 = 25.2x8.5R15

The 1986 Buick Riviera Base Model bolt pattern is 5-115 mm. This means there are 5 lugs and the diameter of the circle that the lugs make up measures 115 mm or 4.53 inches across. To get a close measurement of your 5 lug bolt pattern without a bolt pattern tool you should measure from the center of one lug to the outer edge of the lug furthest from it.