The Ohlins S46HR1C1L shock Aprilia RS 660 is a rear suspension upgrade engineered by Ohlins to replace the stock damper and unlock the full potential of your middleweight sportbike. This is not a cosmetic part: the Ohlins S46HR1C1L shock transforms how your RS 660 handles under braking, in corners and on the edge of traction, which is where riding matters most. Ohlins S46HR1C1L shock Aprilia RS 660: why it matters Pressurized nitrogen and separated reservoir design The Ohlins S46HR1C1L shock uses pressurized nitrogen with a separated reservoir, a design that keeps the damping fluid stable across a wide range of riding speeds and temperatures. On Indian roads, where you might shift from a cool mountain pass to a baking highway in a single ride, fluid stability matters. The nitrogen charge prevents aeration of the oil, which means the damping stays consistent whether you are hard on the brakes in traffic or cruising long stretches. The separated reservoir houses the nitrogen and the damping fluid in different chambers, so the fluid does not foam and the damper does not lose its feel after repeated use. This is the engineering that separates a track-capable shock from a part that feels good for the first week and then softens. The 46 piston is designed to meter oil flow through the damping circuits with precision, controlling how the suspension responds to every input from the road and your riding style. The 16mm inner-tube and precision engineering The 16mm inner-tube is the bore that houses the piston, and the tight tolerance of that bore compared to a stock damper means every adjustment you make is repeatable and predictable. Ride it the same way twice and it feels the same both times, which is how a rider builds confidence on the limit. This level of engineering is why teams use Ohlins shocks on race bikes: once you have set compression and rebound for your weight and your riding style, you know what the bike will do when you ask it to turn or stop hard. Adjustable