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From: AMuzi <am@yellowjersey.org>
Newsgroups: rec.bicycles.tech
Subject: Re: wtf chain ring bolts
Date: Wed, 5 Mar 2025 16:06:10 -0600
Organization: Yellow Jersey, Ltd.
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Bytes: 1971

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.


-- 
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971