GMC Syclone Spare Tire Sizes
The GMC Syclone has used a 5x4.75" bolt pattern for all models from 1991 to 1993 along with a tire diameter of 25.6" 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 GMC Syclone spare tire selections. In this case, a 155/70R17 temporary spare tire is the recommendation for all applications.