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A cracked zipp 404 and a powertap
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TOPIC: A cracked zipp 404 and a powertap

A cracked zipp 404 and a powertap 5 years, 4 months ago #26938

  • shawfox
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Changing the tyre on my old Zipp 404 (not firecrest) today and noiticed cracks around four or five spoke holes. Is this a common problem with this conversion. It was built up by my LBS and I'm wondering now if I should have gone somewhere with specialist experience. It looks from the pattern (cracks are on opposite sides of the rim) as if the guy just overtightened the spokes, but perhaps its the fact that the PT flange is much bigger that the Zipp hub so the spoke angles are all a bit extreme. I take it the rim is toast now. Is there a cost effective way to get hold of a new rim for this old-shape wheel?

Is there a 24 hole rim people would recommend if I have to switch to a new wheelset.

Lots of questions.

Re: A cracked zipp 404 and a powertap 5 years, 4 months ago #26939

  • kraig
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shawfox wrote:
Changing the tyre on my old Zipp 404 (not firecrest) today and noiticed cracks around four or five spoke holes. Is this a common problem with this conversion.


see the attached image to see evidence of how I spent some time last weekend re-lacing a mavic open pro rear rim (I laced it up to another Mavic rim, I think it was a MA3 I picked up through work ~10 years ago) due to spoke hole cracks.



This is fairly typical of Brand M stuff based on my previous wheel engineer experiences with Brand S back in the day. Still sucks that, at ~70kg and with a 36 hole wheel, this happens. The brake tracks are unscathed, pristine, even after probably 5 years of use (though, to be honest, I don't ride in the rain) - disappointing even more that I've probably only ridden this excel-sports built rear wheel for less than 15,000km's...yep, I probably ride about 3k km's a year...so, yeah, this kind of thing (spoke hole cracks) can happen. IMO, if a brake track outlasts a spoke hole, someone F'd up! I'll leave it up to the peanut gallery to decide who is at fault -> let the finger pointing begin! lol!

Is there a cost effective way to get hold of a new rim for this old-shape wheel?


NOS on ebay?


Is there a 24 hole rim people would recommend if I have to switch to a new wheelset.


I wouldn't recommend a 24 hole rear wheel for anything but race-only wheels. For race-only wheels, I've had good success with an ebay'd set of Mavic Cosmic Carbones I picked up probably 5 years ago - at the time they were about $700 for the set - raced on them (and still do) since then.

hope this helps,
-kraig

Last Edit: 5 years, 4 months ago by kraig.
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