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  1. #1
    RoadBikeReview Member
    Join Date
    Apr 2004

    Rear hub on TTR wheel

    I have an older TTR wheel set and I came across something on the rear free hub that I've never seen before. Not sure what brand the hub is - it isn't labeled but appears to be the same as a Bontrager 3-pawl assembly. Anyway, when I removed the cassette and started to disassemble the hub to service it, I noticed a tiny 1.5 mm allen-head screw in the middle of the hub body between the splines. Does anyone know what the purpose of this small screw is?

  2. #2
    RoadBikeReview Member
    Join Date
    Jul 2014
    Could be a grease port maybe?

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