The Evotech Spindle Bobbins Kit for the Aprilia RSV4 Factory fortifies the lower front forks, brake calipers and rear swingarm from expensive damage. If an incident were to occur, the strong materials are designed to take impact first. Furthermore, the innovative Evotech Performance design ensures the nylon bobbin can rotate above the aluminium to reduce wear on the part and stress on the wheel. At the rear, the nearside of the swingarm is protected using our signature bobbin whilst the spindle rod is secured through the wheel by an anodised red hub stop.