Are they cotton reels or spindle sliders? Well they are both really!! These new style offset cotton reels were designed to fit the Aprilia RSV4 09 onwards models to give more strength and support when lifting the machine. The Cotton Reel is mounted to a special, black anodised aluminium bracket (included with the kit), bringing the Cotton Reel away from the exhaust silencer. The product will give protection to the swingarm area in most crashes whilst also allows the bike to be lifted on the Cotton Reels with the use of a paddock stand to perform general maintenance, chain adjustments and cleaning.