PFF19-1302G Front Wishbone Rear Bush Caster Adjustable has been designed around our unique on-car adjustable Nylon/Polyurethane Ball-Joint combination for more direct steering input and improved cornering and braking. The offset bore allows for +/- 0.5   of caster adjustment with the supplied spanner, to assist the fine-tuning of the side-to-side caster settings. Vertical stiffness is increased considerably over standard rubber.