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PostPosted: Mon Jul 21, 2014 5:28 pm 
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Joined: Mon Jul 21, 2014 5:02 pm
Posts: 5
Long time reader first time caller, I was wondering if anyone has ever taken a hub and drilled it to make more spoke holes, or is that an incredibly stupid idea? I am contemplating buying a 20-hole powertap hub off a friend for super cheap but I'm not confident that a 20 wheel would hold up well for me (cat1, 173lb) on anything but a super deep rim.


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Posted: Mon Jul 21, 2014 5:28 pm 


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PostPosted: Mon Jul 21, 2014 6:42 pm 
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Resident Pro

Joined: Tue Mar 18, 2003 9:42 pm
Posts: 2370
use 14 g spokes on a deep rim


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PostPosted: Mon Jul 21, 2014 6:46 pm 
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Joined: Mon Feb 19, 2007 3:44 am
Posts: 2225
Location: Canada
+1.

I used a (friend's) Powertap 20 holes on a kinlin 30 mm with 14g spokes 2 X each sides. Works perfect. Very solid build.

Louis :)


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PostPosted: Mon Jul 21, 2014 6:46 pm 
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Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2196
Location: Santa Cruz, California, USA
It is a bad idea. The holes would not be evenly placed making spoke length calculations a nightmare and creating a funky unbalanced lacing pattern. With a normal sized hub, the extra holes you drilled would be too close to other holes so the spokes would pull through, ruining the hub. The larger diameter of the PT hub makes that less likely.

You are right about 20h not being enough for your size.


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PostPosted: Mon Jul 21, 2014 11:42 pm 
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Joined: Tue May 23, 2006 4:33 am
Posts: 1082
Take away this man's drill.

There are many issues, including precision, finishing of a spoke hole (local honing, removal of any stress risers, etc. etc.), plus why you'd want a 40-hole Powertap wheel? (I don't think Powertaps will even be accurate with extreme drillings, if I remember correctly -- they are calibrated for the spoke count the hub is drilled for.) You have a 20 spoke wheel ahead of you, or you sell the hub and get something else. And I'd agree with others above ... you need to sell the hub.


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