SATO RACING Front Axle Sliders (part# A-RSV4AS-F) for 2009-18 Aprilia RSV4 and 2012-18 Tuono V4 series feature L + R-side slider pucks made of high density, abrasion-resistant black DELRIN for optimal protection on the track. Sliders are fastened to the front axle hub with a stainless steel through-bolt. Easy install.