Harder KranK durometer bushings (96a & 93a) are for heavier-weight riders (over 150lbs) as harder durometer bushings allow for a nice tight set-up.
Medium KranK durometer bushings (90a & 87a) are best for medium-weight riders (125lbs & over) as well as for those looking for a looser setup in the RoadSide position when coupled with a harder duro bushing.
Softer KranK durometer bushings (84a) are best for lightweight riders (under 125lbs). Super fun for those looking for a really loose setup.
PLEASE NOTE: The KranK Formula has quite a bit of adjustability - so order accordingly! You can tighten the kingpin nut up to two full turns to 'harden' or 'loosen' the duro.
Not sure what size bushings your truck will work with?
What combo bushings to use? Which Formula to choose?