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  1. #1
    ec velo
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    hollowtech fixing bolts with hex heads?

    Are there such things anywhere as hollowtech fixing bolts with hex heads instead of that stupid shimano star pattern?


  2. #2
    Senior Member
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    not that i know of. what is the problem?

  3. #3
    ec velo
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    It would be useful to be able to preload one's bottom bracket with only a multi-tool.

  4. #4
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    Is that "star pattern" a standard Torx size? If so, any hardware. home center or auto parts store has the wrenches or bits.

  5. #5
    ec velo
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    Nope, the star pattern is not a standard torx size. It's a proprietary shimano thing. There are only two tools out there for it: Park BBT-9 and Park BBT-10.




  6. #6
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    just buy the 2 dollar shimano plastic one, drill a hole, and tie it to your multi tool. done

  7. #7
    ec velo
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    What 2 dollar shimano plastic one?

  8. #8
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    Shimano TL-FC16

  9. #9
    SE Wis dedhed's Avatar
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    '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400

  10. #10
    bike whisperer Kimmo's Avatar
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    Looks like a smaller version of the spline shape hubs engage the cassette body with.

    If it's not actually any smaller, I guess you could turn an old hub into a tool.

  11. #11
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  12. #12
    ec velo
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    Yeah, I see you can get cheap small tools. I just think it's lame shimano had to not use a standard hex key hole.

  13. #13
    bike whisperer Kimmo's Avatar
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    What would it be, 12mm? Not exactly common anyway.

  14. #14
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    FSA's crank-bolts have a hex head, although I don't know if the threads are the same. But with a hex key it's extremely easy to apply far too much torque, overloading the bearings.

    I imagine Shimano designed the strange bolt to oblige you to use their strange tool. And the strange tool (the official one, at least) is clearly designed to limit the amount of torque that can be applied.
    shimano_tl-fc16_tool.jpg

  15. #15
    Senior Member oldbobcat's Avatar
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    It's not lame, it's insurance against over-tightening the crank bolt and crushing your bearings. Ever see what happens to an FSA bottom bracket after over-tightening and a hundred miles? Nasty.

  16. #16
    bike whisperer Kimmo's Avatar
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    Heh, a 12mm allen fitting kinda encourages a hefty cranking

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