Re: wtf chain ring bolts

On Thu, 06 Mar 2025 12:26:38 -0800, Jeff Liebermann <jeffl@cruzio.com>
wrote:

On Thu, 06 Mar 2025 12:46:42 -0500, Catrike Ryder
<Soloman@old.bikers.org> wrote:
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On Thu, 06 Mar 2025 17:04:06 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
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On Wed Mar 5 16:08:18 2025 Catrike Ryder  wrote:

The chain ring guard came so I set about mounting the chain rings and
the guard. I ordered new chain ring bolts because I didn't want to
disassemble the old crank. The new inner bolts had hex deep down
inside and I figure that was fine until I could not find a allen
wrench that fit them. I tried both metric and standard and nothing
fits. The bolts on my old crank take a #5 allen.
 
Does anyone know what's going on?
 
I ordered another set of 16mm bolts and they look like they have a
larger hex that's not set deep inside it.

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Modern crank bolts can be made out of aluminum and instead of allen bolt may be Torx. Usually you can use the camera option on your smart phone to see close enough to identify this.

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Aluminum crank bolts are for weight weenies, and I did try a torx
driver on them. The bolts were mismanufactured. I tossed them. Not
worth trying to return them.

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They also may have been misordered.  There are Torx and Torx Plus
heads.  Common Torx heads have a 15 degree drive angle, while Torx
Plus has a zero degree drive angle. 
<https://i.imgur.com/dvIdABh.jpeg>
>
"The Evolution of Torx: From Torx to Torx Plus and Beyond"
<https://www.youtube.com/watch?v=EhRcWaEkHtE>  (7:52)

No, I don't think so. The other smaller bolts on that order all took a
#5 metric.  The 16mm bolts were just a bad bunch. New ones on order.
Be here tomorrow.

--
C'est bon
Soloman