Includes a new primary spring, a custom helix, and a new torsion secondary spring. Instructions include a “set up guide” including secondary spring adjustments for different tire sizes. This also includes settings for the stock secondary spring if you alternate to smaller 26″ tires, etc.
* using a heavier secondary spring when not necessary can affect top speed.
The Standard Non-EBS version is well calibrated for stock 25″ tires and no clutch re-calibration is necessary. The older adjustable torsion style secondary clutch allows for a bit of flexibility. For oversized tires in this application we have two different cost effective kits.