Join Date: Aug 2007
Location: Seattle, WA
Bikes: 08 Specialized Tarmac Expert, 09 Cinelli Vigorelli, 05 Trek Bruiser
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You never really bothered to elaborate on whether you rode around on the wheel at all. Depending on whether you rode it or not, I can only agree with the opinions that you simply had metal bits from when the hub was initially machined.
I had a similar problem, only the deal was that I had over torqued the cog and lock ring.
Oh, and the formula vs. THE WORLD argument? I've ridden formulas before, in fact I still run in the front. Manufacturing plays a great deal in to the rear wheel of any fixed gear bike. If you have one that is made of a material softer than your cog and lock ring, you are gonna spin right through it and eventually jack your hub up. This typically is a major problem. Also, sealed vs. unsealed should never be disputed, unless you are talking that is as fine and precise as Campagnolo or Dura Ace sealed wins hands down.