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PostPosted: Wed Jun 19, 2013 12:19 pm 
Windmilling for a Scotch Egg
Windmilling for a Scotch Egg
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Joined: Tue Feb 15, 2011 10:27 am
Posts: 4840
Location: Huddersfield, West Yorkshire
I am installing a RS7 cranks but I've hit on a snag with the inner chainring bolts. Standard ones are too long as they are bottoming out before they tighten the granny ring onto the crank. I can't see any shorter bolts for sale anywhere (not done an exhaustive search yet though).
The spacing between the chainrings seems to be ok without any washers - is that correct? Or do I need washers?


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PostPosted: Wed Jun 19, 2013 12:26 pm 
Retro Guru

Joined: Tue Dec 04, 2012 6:15 pm
Posts: 523
Not had any problems with my RS7s, what bolts are you using? I used Middleburn bolts, perhaps your bolts are slightly longer. I've had problems in the past with bolts being too long on a set of raceface cranks.


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PostPosted: Wed Jun 19, 2013 12:27 pm 
National & North West AEC
National & North West AEC
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Joined: Mon Nov 03, 2008 12:43 am
Posts: 8146
Location: Macclesfield Forest
For shorter bolts you can use singlespeed specific ones. Available here amongst other places: --> http://www.charliethebikemonger.com/cha ... -204-c.asp

Not sure why standard bolts would be bottoming out though Rob. The bolts cold be longer than usual or you could be missing spacers.


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PostPosted: Wed Jun 19, 2013 12:31 pm 
Windmilling for a Scotch Egg
Windmilling for a Scotch Egg
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Joined: Tue Feb 15, 2011 10:27 am
Posts: 4840
Location: Huddersfield, West Yorkshire
dp


Last edited by MiniNinjaRob on Wed Jun 19, 2013 12:42 pm, edited 1 time in total.

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PostPosted: Wed Jun 19, 2013 12:32 pm 
Windmilling for a Scotch Egg
Windmilling for a Scotch Egg
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Joined: Tue Feb 15, 2011 10:27 am
Posts: 4840
Location: Huddersfield, West Yorkshire
Do I need spacers then? I have loads of what appears to be standard length bolts and they are too long.


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PostPosted: Wed Jun 19, 2013 2:41 pm 
retrobike rider
retrobike rider
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Joined: Sun Feb 19, 2012 10:08 am
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Location: Nth Somerset, UK
What are they bottoming out on?

On my RS7's the tapped hole runs straight through the spider, so any excess thread is seen from the outside.

Are we talking middle, or granny ring here?


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PostPosted: Wed Jun 19, 2013 2:49 pm 
Windmilling for a Scotch Egg
Windmilling for a Scotch Egg
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Joined: Tue Feb 15, 2011 10:27 am
Posts: 4840
Location: Huddersfield, West Yorkshire
Granny ring.


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PostPosted: Wed Jun 19, 2013 3:02 pm 
retrobike rider
retrobike rider
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Joined: Sun Feb 19, 2012 10:08 am
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Location: Nth Somerset, UK
Don't the bolts just go straight through the spider?

Of course you may have a different spider to me, mine is 94 / 58.


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PostPosted: Wed Jun 19, 2013 3:50 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8216
Location: New Forest, UK
I came upon this with my 94/58 spider, which had blind holes for the inner. Fortunately I had some other bolts in the toolbox and used them. I think there's about 1mm difference in length that does it - it was almost (but not quite) tight on the ring.


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PostPosted: Wed Jun 19, 2013 4:12 pm 
Windmilling for a Scotch Egg
Windmilling for a Scotch Egg
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Joined: Tue Feb 15, 2011 10:27 am
Posts: 4840
Location: Huddersfield, West Yorkshire
hamster wrote:
I came upon this with my 94/58 spider, which had blind holes for the inner. Fortunately I had some other bolts in the toolbox and used them. I think there's about 1mm difference in length that does it - it was almost (but not quite) tight on the ring.


That's exactly the same amount as me, about 1mm.

Short bolts seem to cost a fortune though. :-(


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