what are these called and where to get them?
Re: what are these called and where to get them?
squeaker wrote:Chainring bolts
HTH
Thanks for the link. Are they all a standard size as I don't see any size information on the webpage?
Re: what are these called and where to get them?
they are of different lengths to accomodate single or multiple chainrings.
that pic is of a single chainring set up.
that pic is of a single chainring set up.
Re: what are these called and where to get them?
tommydog wrote:squeaker wrote:Chainring bolts
HTH
Thanks for the link. Are they all a standard size as I don't see any size information on the webpage?
No they are not all the same.
There are inner and outer for double or the two largest rings on a triple.
https://www.sjscycles.co.uk/chainsets/b ... -set-of-5/
Inner only for the smallest ring on a triple
https://www.sjscycles.co.uk/chainsets/t ... pack-of-5/
Inner and outer for a single chainring.
https://www.sjscycles.co.uk/chainsets/s ... pack-of-5/
Re: what are these called and where to get them?
You might want to get the little tool that goes into the slots on the back to stop the whole thing spinning as you tighten it up with a Allen key from the other side. If these bolts are loose you will be driven demented by creaking sounds as you pedal.
Re: what are these called and where to get them?
the_twin wrote:You might want to get the little tool that goes into the slots on the back to stop the whole thing spinning as you tighten it up with a Allen key from the other side. If these bolts are loose you will be driven demented by creaking sounds as you pedal.
Absolutely not necessary if you make sure
a) that the threads are not dirty or otherwise obstructed (eg by running the two halves in and out of one another before installation) and
b) using grease on the screw threads only of both parts of the bolt. The rest of the assembly should be assembled bone-dry.
For its diameter the thread has an unusually fine pitch; this (if greased and unobstructed) allows it to be fully tightened without having to grip the sleeve part of the bolt at all.
Such bolts are available in stainless steel, but you need a length that is correct for your parts, and they can vary a bit, e.g. so all 'double length' bolts are not the same.
e.g. https://www.sjscycles.co.uk/chainsets/id-stainless-steel-chainring-bolts-m8-x-075-double-85-mm-nuts-pack-of-5/
cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Re: what are these called and where to get them?
the_twin wrote:You might want to get the little tool that goes into the slots on the back to stop the whole thing spinning as you tighten it up with a Allen key from the other side. If these bolts are loose you will be driven demented by creaking sounds as you pedal.
yes i had that, so grease them when you install them
Re: what are these called and where to get them?
The doofus is only £3. Also handy when whoever put them in wasn’t so clever with the grease.
Re: what are these called and where to get them?
the_twin wrote:The doofus is only £3. Also handy when whoever put them in wasn’t so clever with the grease.
GPWM, although normally 'doofus' is someone and 'doofer' is something.
If they are 'very well in' through prior (in)-action I usually find I need to remove the crankset and use a specially made tool that fit in the bench vice, and heat etc to remove the bolts.
Most of the tools that you can buy cheaply are apparently of help when tightening but are sadly no match for a well seized bolt; I do not recommend that you buy such a thing for assembling these bolts; arguably all it does is encourage you to assemble the bolts without the necessary checking for binding and lubrication, and causes trouble down the line.
cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Re: what are these called and where to get them?
the_twin wrote:You might want to get the little tool that goes into the slots on the back to stop the whole thing spinning as you tighten it up with a Allen key from the other side. If these bolts are loose you will be driven demented by creaking sounds as you pedal.
Do you mean this:
https://www.sjscycles.co.uk/tools/park- ... ut-wrench/
The tool may be useful as it was very difficult to remove these. I had to resort to tapping it round with a hammer / screwdriver.
Re: what are these called and where to get them?
Brucey wrote:the_twin wrote:
Such bolts are available in stainless steel, but you need a length that is correct for your parts, and they can vary a bit, e.g. so all 'double length' bolts are not the same.
e.g. https://www.sjscycles.co.uk/chainsets/id-stainless-steel-chainring-bolts-m8-x-075-double-85-mm-nuts-pack-of-5/
cheers
But I only have one chainring. So I guess it's these if I want stainless:
https://www.sjscycles.co.uk/chainsets/i ... pack-of-5/
can't see any other sizes for single chainring
Re: what are these called and where to get them?
tommydog wrote:the_twin wrote:You might want to get the little tool that goes into the slots on the back to stop the whole thing spinning as you tighten it up with a Allen key from the other side. If these bolts are loose you will be driven demented by creaking sounds as you pedal.
Do you mean this:
https://www.sjscycles.co.uk/tools/park- ... ut-wrench/
The tool may be useful as it was very difficult to remove these. I had to resort to tapping it round with a hammer / screwdriver.
That's the sort of thing, yes.
Re: what are these called and where to get them?
tommydog wrote: I only have one chainring. So I guess it's these if I want stainless:
https://www.sjscycles.co.uk/chainsets/i ... pack-of-5/
can't see any other sizes for single chainring
I guess so. They can always be made shorter if needs be.
BTW if you have but one chainring, it may be possible to fit a chainguard, if that is the sort of thing you might fund useful. Now is the time to think about it, anyway.
cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Re: what are these called and where to get them?
Brucey wrote:
BTW if you have but one chainring, it may be possible to fit a chainguard, if that is the sort of thing you might fund useful. Now is the time to think about it, anyway.
cheers
come to think of it, I was just considering that! Never had a bike with a chain guard before, but think it may be useful. Do you have a preference? I have so far looked at the Hebie Chainglider and the SKS Chainboard for my Rohloff equipped bike. But on the other hand I don't see many touring bikes with chainguards, so wonder why? On paper they seem to make a lot of sense.