What in the world is a speed index?

A speed category, or index, on a racing mule is based on racing performance. In official racing programs, a mule's speed index is listed directly after the mule's name, e.g., Black Ruby (98). Mules run their first races at the index of 61 and under. Thereafter, the speed index is the average of their next five races. Upon reaching seven races, the times for their fastest race and slowest race are discarded and times for the other five races are averaged to arrive at the "speed index." The speed index chart is updated at the end of each fair race meet.

| Go to AMRA Speed Index |