Buick Grand National Spare Tire Sizes
The Buick Grand National has used a 5x4.75" bolt pattern for all models from 1985 to 1988 along with a tire diameter of 26.0" 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 Buick Grand National spare tire selections. In this case, a 165/70R17 temporary spare tire is the recommendation for all applications.