Check Bike Fitment Below This is A must do if you are running 16/19in or 18/21in wheel sizes. It raises the rear end of the bike to compensate for a smaller rear tire, fixing your geometry angle. there are 3 different sizes 0" rise is the same as Oem 0.75" is the middle rise option 1.5" is the most rise option Hardened Stainless Steel Bushings Forged 7075T6 aluminum More material in the main pivot bearing area Abec 5 bearings Pressed in rubber seals Includes new Stainless Steel bushings for a precision, no-slop fit Available in 5 colors Warp 9’s new and improved V3 linkage has improved features: Warp 9’s V3 linkage in an OEM Height linkage Now greaseable with Zerk fittings Includes Low profile Zerk fitting for triangles that might hit traditional Zerk fittings Includes traditional Zerk fittings that fit most grease guns. Pre lubed with Lucas Red Stick Grease Forged 7075T6 aluminum Hardened Stainless Steel Bushings Revised needle bearings with thicker needle cage