800 Outlander / Renegade 4 X 4 - For 28” and larger competition mud tires (adjustable kit). DBO 800 M: This new kit is more focused on larger, extreme mud tires and heavy mud use. Includes our most popular primary spring and the yellow/black secondary, along with mass adjustment rivets and detailed instructions for flyweight set up for various mud tires and applications.This kit is only recommended for the described application. If you run smaller tires for trail use, you will have much better CVT efficiency with the regular kits listed.