Park Tool SAC-2 SuperGrip Carbon and Alloy Compound - 4oz Tube Rear Derailleurs and the raised platform edges

and the raised platform edges give your shoe extra support when you need to stand off the pedal momentarily

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If you run Crankbrothers pedals across multiple bikes

Park Tool SAC-2 SuperGrip Carbon and Alloy Compound - 4oz Tube Rear Derailleurs and the raised platform edgesWhen Should You Use the SAC 2 Carbon and Alloy Compound? The Park Tool SAC 2 SuperGrip Carbon and Alloy Compound is a friction paste designed to increase grip between components at clamped interfaces, allowing you to use lower clamping torques without slippage on seatposts, stems, and handlebars made from carbon fiber or aluminum. It provides the friction needed to prevent rotation or slipping at the point of contact, protecting both the component and