Trying to install mudguards - what's with this hole?

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craker
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Joined: Wed Nov 07, 2007 21:34 pm

Trying to install mudguards - what's with this hole?

Postby craker » Wed Oct 03, 2012 21:09 pm

A picture paints 1000 of them words-

Image

I thought I could put a bolt through it to attach the mudguard to but it's not drilled through. It's not tapped so I can't put a bolt into it. It looks like there's a boss on it so it must be there for some reason, or is it just to let out hot air during welding or drainage from the frame?

Either way what do I bolt my mudguard to... ?

The bike is a 2005 aluminium Fort supposedly Audax ready.

MonkeyCowboy
Posts: 175
Joined: Sun Nov 10, 2002 16:30 pm

Re: Trying to install mudguards - what's with this hole?

Postby MonkeyCowboy » Wed Oct 03, 2012 21:43 pm

That almost looks like a grub screw? Can you undo it with an allen key?

getprg
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Joined: Fri Aug 21, 2009 22:04 pm

Re: Trying to install mudguards - what's with this hole?

Postby getprg » Wed Oct 03, 2012 21:59 pm

That almost looks like a grub screw? Can you undo it with an allen key?


+1 - although looks like you would need to apply plenty of WD40 to ease it off before having a go at unscrewing.

However IME when fitting SKS guards for example it is not essential to fix leading end of rear mudguard to chainstays bridge by bolting through it. The SKS fixing kit usually includes a spring clamp that will clip round the bridge without bolting.

MichaelW
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Joined: Thu May 15, 2003 11:09 am

Re: Trying to install mudguards - what's with this hole?

Postby MichaelW » Thu Oct 04, 2012 08:51 am

Looks like some kind of rivet. You can get threaded rivets for inserting into aluminium frames.
I usually drill the mudguard 1cm from the tip and use a small ziptie around the bridge, it holds well and lasts for years. much better than the metal bracket.
With narrower frames, I also nibble away at the sides of the mudguard to form two recesses which grip and hold the mudguard in place between the stays. If you remove too much, it won't grip.

DesWeller
Posts: 5233
Joined: Mon May 05, 2008 15:36 pm

Re: Trying to install mudguards - what's with this hole?

Postby DesWeller » Thu Oct 04, 2012 22:59 pm

Mine is drilled through. Are you sure it's not just full of crud.

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gosport_commuter
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Re: Trying to install mudguards - what's with this hole?

Postby gosport_commuter » Fri Oct 05, 2012 10:33 am

Looks like a rivnut to me, should have a thread in it, but maybe its knackered. try m5 and m6 bolts, failing that maybe you could drill it through and use a bolt + nut.


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