When choosing the belt size, the size of the drive must be known. If only inches are known, take the belt length and divide by 25.4. These guidelines are based on standard applications and many variables can change the proper belt size. Using aftermarket products such as Tilton drives and RTC powerglide mounts will require measuring in order to determine proper belt size.
20T Drive - Sold with KSE Tandem kit, Pro-Tek madrel kit and most belt kits
24T Drive - Common with Falcon applications
35T Drive - Common with Bert applications
40T Drive - Common with Brinn applications