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Old 04-30-07, 10:34 AM   #1
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Rack mounting issues

Hey guys, wondering if you can help me out with this.

I'm mounting a rear rack. I have it all mounted, but the bolts that attach the rack to the seat post are all loose. The rack came with those auto-locking nuts that only go over the end of the bolts. This means that I can't tighten them down all the way. Is this normal for racks? Or should I go to a local hardware store and get shorter bolts and/or different nuts?
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Old 04-30-07, 10:38 AM   #2
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Quote:
Originally Posted by squegeeboo
Hey guys, wondering if you can help me out with this.

I'm mounting a rear rack. I have it all mounted, but the bolts that attach the rack to the seat post are all loose. The rack came with those auto-locking nuts that only go over the end of the bolts. This means that I can't tighten them down all the way. Is this normal for racks? Or should I go to a local hardware store and get shorter bolts and/or different nuts?
I assume the nuts are "acorn nuts" and have bottomed out before the bolts are tight. The have the advantage of covering the sharp ends of the bolts but do limit travel Yes, certainly get shorter bolts that will allow you to tighten them completely.
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Old 04-30-07, 10:38 AM   #3
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I'm not sure I'm understanding the question.

Are the bolts threading into something and come out the other side (other than the nuts) or do they just go throuh something or do they thread in to one side of the seat stay and are bottoming out on the inside of the other side of the tube?

Thanks
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Old 04-30-07, 10:44 AM   #4
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I assume the nuts are "acorn nuts" and have bottomed out before the bolts are tight. The have the advantage of covering the sharp ends of the bolts but do limit travel Yes, certainly get shorter bolts that will allow you to tighten them completely.

Yup, those are the nuts, thanks for the advice to the hardware store it is then.
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Old 04-30-07, 11:55 AM   #5
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If the holes in your frame are threaded, then they probably use an M5 thread.
The best bolts for racks are stainles steel M5 allen bolts. The correct length is one that protrudes a couple of threads on the inside when using appropriate washers.
It generally isnt neccessary to fit a locking nut on the inside. If you have room and want to use one, use a Nylock style of nut which will not losen with vibration.
If you only have one set of threaded eyelets, will you want to fit fender stays with the same bolts? In which case you need longer bolts and you place the fender on the outside of the rack stay.
The bolt threads should be -very- lightly smeared with grease before fitting.
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Old 04-30-07, 01:43 PM   #6
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+1 to the locknut. I'd leave the bolts and replace the acorns.
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Old 04-30-07, 08:22 PM   #7
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hey guys thanks for all the advice, turns out I'm just a moron. I went to the hardware store with my delima, where i learned that the nuts I have, are just locking nuts, not acorn nuts, and you want to thread them down past the plastic at their end all the way until they are snug. Who knew?
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