Super Slick 41mm Inner Fork Bushings Honda / Kawasaki / Suzuki / Yamaha / Triumph / BMW / Ducati / Buell Super Slick Inner Fork Bushings, made of FEP and tin composite, boast Ptfe coating with the lowest friction properties. The ingenious low-friction design ensures top-tier suspension performance. Features: Inner bushings mount on the inner (chrome) fork tube and have Ptfe on the outside of the bushing Outer bushings mount on the outer (aluminum) fork tube and have Ptfe on the inside of the bushing Fork Tube diameter 41mm Inner bushing width 20mm Thickness 1mm