Checking your chain and rotors for wear is crucial if you want to get the most out of your components and stay safe. A worn-out chain is slower, can affect the durability of your entire drivetrain and can snap more easily. Similarly, disc rotors that are too thin mean your braking power is drastically lower than with new rotors, which leads to unreliable braking and dangerous situations. With the Double Checker, you know exactly how worn your chain and rotors are. The Double Checker measures true pin wear, which is the most relevant measurement to have. Separating pin wear from roller wear gives a more accurate result, enabling you to know the exact state of your chain. The rotor check, built-in chain hook and ruler make the Double Checker an unmissable tool in every cyclist’s toolkit.
