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lower eyelet bolts

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Old 09-22-08, 05:58 AM
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Jay H
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lower eyelet bolts

I need 2 lower eyelet bolts for my rear rack (Old Man Mtn Red rocks) since I had to break the bolts to remove it from my old beatup commuter bike. I have a new frame but now need new bolts. What particular bolt can I buy and could I get it from a hardware store which is more convenient than going to my bike shop (farther away). I think they are 4mm hex bolts? M4x?? The drive side one has to be short enough not to interfere with the smallest cog on the cassette.. so not sure about length since my MTB is at home.

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Old 09-22-08, 06:26 AM
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Aha, found them:

http://www.nashbar.com/profile.cfm?c...All%20Products



they are:

M4x12x.8

Cool...

Jay
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Old 09-22-08, 07:28 AM
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Or, go to boltdepot.com and get exactly the length you want, or a variety of lengths.
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Old 09-22-08, 07:55 AM
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Originally Posted by Jay H View Post
Aha, found them:

http://www.nashbar.com/profile.cfm?c...All%20Products



they are:

M4x12x.8

Cool...

Jay
Much more likely the size required is M5 x .8. Some older frames were M6 x 1. Don't remember ever seeing one with a 4mm hole.
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Old 09-22-08, 07:56 AM
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Originally Posted by JanMM View Post
Or, go to boltdepot.com and get exactly the length you want, or a variety of lengths.

God Lord, $0.34 in bolts, $7.38 to ship.
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Old 09-22-08, 08:36 AM
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yeah, not going to go mail order for some cheap bolts!

I do recall using a 5mm hex wrench... I have a bolt that fits fine with the thread pitch but it's way too long, I can bring that to the store and use as a guide anyway...

Jay
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Old 09-22-08, 10:26 AM
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Any Home Depot, Lowes or decent hardware store has a good selection of metric bolts these days and, as Dan Burkhart noted, they are much more likely to be M5x .8 bolts that you need. They are available in a variety of lengths so get the ones that fit or cut down long ones.

BTW, many M5 bolts require a 4mm hex key so that may be where the M4 designation came from.
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Old 09-22-08, 11:45 AM
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Originally Posted by Jay H View Post
yeah, not going to go mail order for some cheap bolts!

I do recall using a 5mm hex wrench... I have a bolt that fits fine with the thread pitch but it's way too long, I can bring that to the store and use as a guide anyway...

Jay
If the old bolts took a 5mm hex key, they are gonna be M6x1
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Old 09-22-08, 12:42 PM
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M5 is standard these days. The length you need might vary.

The Lowes, Home Depot and Menards stores in these parts carry pathetically minimal metric stuff. The Ace Hardware selection was better, but the two local ones closed.
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Old 09-22-08, 12:43 PM
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Originally Posted by dobber View Post
God Lord, $0.34 in bolts, $7.38 to ship.
beats driving to 3 or 4 places and still not getting exactly what you need
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Old 09-22-08, 04:02 PM
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Originally Posted by JanMM View Post
beats driving to 3 or 4 places and still not getting exactly what you need
True. Then again, you can determine what you need in advance and just go one place. The threading of rack mounts, water bottle cages, etc is pretty standard.


In this case, M5 bolts, generally 12-16mm
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Old 09-22-08, 05:30 PM
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OMM tells me they are M5x16x.8...

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