REAR MECH SETUP… HELP

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  • REAR MECH SETUP… HELP
  • IHN
    Member

    That’ll be the B-tension screw.

    When you’re on the largest cog on the back, adjust that screw so that the top jockey wheel on the mech is just, like a teensy-tiny bit, below the cog.

    Look on the Park Tools website for a more technical explanation

    That’s the B-screw….

    Parktool

    soobalias
    Member

    wot they sed

    tis the angle of the dangle.

    rocklobster
    Member

    I am trying to set up my new rear mech and I am unsure how to set up one of the screws. What is the purpose of the small screw that pushes against the mech hanger and how do I adjust it so that the rear mech is set up correctly. (I’m not talking about the high and low limit screws just to be clear).

    mrdestructo
    Member

    Well, dunno about “teeny” as when i built up my current bike I had to put that jockey wheel out further than I thought I’d have to. Figured that out riding up and down the car park with my multitool clutched in one hand swearing profusely.

    Yup, that’s the B-screw. Bolt on the mech without the cable attached. Push the mech over to line up with the largest cog – the gap should be 6mm (at least for SRAM X9). Adjust the B-screw so the gap is correct, using a 6mm allen key to measure it. Align mech with smallest cog and set high limit screw. Attach cable, run mech to largest cog and set low limit screw. Job done

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