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TRP TR12 rear derailleur

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  • The new TR12 rear derailleur is able to provide a quiet and accurate ride over the roughest trails. The key feature to this pursuit is the Hall Lock. During the Race season, lead mechanic for Intense Factory Racing, John Hall, noticed excessive movement around the b-knuckle when riding over rough rock gardens and in tracked out corners. This was leading to more chain skipping and slapping creating possible variances in shifting. This inspired John’s idea to lock the B-knuckle to the bike’s derailleur hanger. TRP engineers worked closely with Hall to create this feature, The Hall Lock.

    • Hall Lock
    • G-Spec Ratchet Clutch
    • G-Spec finishing touches:
    • Carbon fiber cage & Upper link
    • Extra wide parallelogram pivot
    • Sealed cartridge bearings pulleys


    Hall Lock
    TRP engineers worked closely with John Hall to create the Hall Lock. A Lever integrated into the B-knuckle mount, which can be opened or closed, as needed. For working on the derailleur or changing the wheel, the Hall Lock is opened. When locked, the derailleur is stabilized for the roughest conditions. This feature helps maintain the utmost accuracy in shifting and superb chain retention. Its clamping force can be adjusted to balance stability and security with the derailleur’s ability to deflect on impact.
    • Hall Lock is an on/off feature with adjustable force that brings TRP’s derailleurs the utmost stability, accuracy, chain retention and quietness in operation for mountain biking’s roughest conditions
    • It can lock-out the main pivot bolt to prevent your derailleur from lifting, slapping and making noise
    • You can set it up however you like – if you want maximum stability you can lock it; if you like it to move like a standard derailleur you can adjust it to do so


    Ratchet Clutch
    The second derailleur feature is a ratchet style clutch, which is adjustable. Depending on a full suspension bike’s design, there can be enough chain growth to feel resistance from the clutch. If a rider wants to free up the system up, he or she can back off the clutch to balance pedal feedback with the clutch’s chain retaining properties.
    • Large diameter clutch surfaces for wear resistance and predictable force generation
    • Oversized friction surface area for consistent force output
    • Adjustable clutch force provides a wide range of customizable ride tuning and compensation for wear
    • Quick and easy on/off switch removes all clutch force when needed for wheel changes
    • Robust pawl engagement


    Chain lenght indicator
    • Indicators printed on the knuckle and the cage for easy viewing
    • This marking helps ensure a quick and accurate measure of the system’s required chain length


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