I did a quick search and found this. See if this helps you...
In addition, the part number should be clearly printed right on the belt.... If you read the sticky at the top of the page, you will see that the part numbers change, come and go, and are not used at all for the next year of engine coach. Be sure and verify. I dont accept the numbers at the top of the forum... I verify either by recording the number or as a last resort, calling Spartan on the tele.
Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5FI