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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 07-03-11, 10:35 AM   #1
sheba
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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?

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Old 07-03-11, 10:37 AM   #2
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not that i know of. what is the problem?
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Old 07-03-11, 10:44 AM   #3
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It would be useful to be able to preload one's bottom bracket with only a multi-tool.
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Old 07-03-11, 10:47 AM   #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.
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Old 07-03-11, 11:09 AM   #5
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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.



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Old 07-03-11, 11:21 AM   #6
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just buy the 2 dollar shimano plastic one, drill a hole, and tie it to your multi tool. done
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Old 07-03-11, 01:44 PM   #7
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What 2 dollar shimano plastic one?
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Old 07-03-11, 02:03 PM   #8
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Shimano TL-FC16
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Old 07-03-11, 02:56 PM   #9
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OK it's $3
http://www.jensonusa.com/store/produ...l.aspx?sc=FRGL
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Old 07-03-11, 07:14 PM   #10
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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.
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Old 07-03-11, 09:22 PM   #11
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http://www.nashbar.com/bikes/Product...2_10000_202573
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Old 07-03-11, 11:58 PM   #12
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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.
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Old 07-04-11, 02:59 AM   #13
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What would it be, 12mm? Not exactly common anyway.
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Old 07-04-11, 04:34 AM   #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.
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Old 07-04-11, 07:50 PM   #15
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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.
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Old 07-04-11, 10:52 PM   #16
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Heh, a 12mm allen fitting kinda encourages a hefty cranking
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