Re: wtf chain ring bolts

zen cycle <funkmasterxx@hotmail.com> wrote:

On 3/5/2025 5:06 PM, AMuzi 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.

 
I have a set that are torx, and it's a known "problem"
 
https://www.reddit.com/r/cycling/comments/6drndl/shimano_chainring_bolts_t30_torx_why/?rdt=44490
 
If the bolts have crud built up and the light isn't really good, they
can look like Allen,
 
Just make sure whether they're Imperial or Metric :)
 

Talking of standards, my dad had loads of fun, at Halfords which is car and
bike chain stores, getting some new tyres for the New Hudson bike which is
old much abused bike and has 26inch tyres but not the “normal” ones which
resulted in lots of head scratching by Halfords, I think there are 3
separate similar sized but different sizes with out checking the bible aka
Sheldon Browns site!

Roger Merriman