Re: wtf chain ring bolts

On Wed, 5 Mar 2025 16:06:10 -0600, AMuzi <am@yellowjersey.org> wrote:

On 3/5/2025 3:08 PM, 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.
 
--
C'est bon
Soloman

>
News to me; 5-arm 110mm chainring bolts are a universal
commodity AFAIK.
>
With a magnifier, see if they are just broached poorly or
maybe if they are Torx.  If you succumbed to the bad idea of
an aluminum chainring bolt that's very possible.

Nope, not aluminum and not torx. A closer look shows they they are
very uneven, not even hex slots. The set included 12mm and 8.5mm bolts
and they take a 5MM allen.  The inside wall further up on the 16mm is
smooth and round, so I think what happened is that the 5mm hex never
got done.  At any rate, they're in the trash. New ones are coming from
a USA based bike shop, not Ebay.

--
C'est bon
Soloman