• A few problems exist with track hub lock rings:

    1. Hook wrenches are crude tools
    2. A tool which could be operated with a torque wrench would take the uncertainly out of tightening, leading to fewer failures of both kinds - under-tightened lock rings loosening, and over-tightening damaging the hub threads.
    3. Sprockets with deep recesses (i.e. belt drives) need a socket-type tool as a simple flat wrench can't pass the sprocket overhang.
    4. Chain running on small sprockets (12T, sometimes 13T) can hit flat lock rings, preventing proper meshing.
    5. Steel ones are needlessly heavy, given that the male thread is quite soft aluminium

    Each of these problems has been solved individually by various makers, but I haven't seen a product which addresses all of them at once.

    Specification:
    1,2,3. Drive to the lock ring to be via a spline to fit common HT2/GXP/UT BB cup tools. If you have fitted a modern BB, you probably have one of these tools already, there are loads of versions out there including sockets

    1. A step to allow Wippermann 1R8 chain on a 12T sprocket to clear the driver spline
    2. 7075T6 aluminium alloy, so it's light but still stronger than the hub
      To keep cost under some sort of control, raw finish. Anodising would be troublesome, since it would mean machining blanks, then anodising, then going back to the lathe to cut threads. It should be possible to make a mix of thread sizes without too much trouble, so 1.290"×24tpi LH BSC (JIS, ISO) 33.5mm×24tpi LH BSC (Campag, Phil, Miche) and M33×1.0mm LH (Mavic) are possible. Feel free to spam anywhere you see a need for this product with a link to this thread :-)

    1 Attachment

    • HT2_Stepped_lockring_iso.jpg
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