Ultra Torque Pista Campagnolo Ultratorque Track crank conversion

Truvativ/SRAM Omniums are fine for track use, although obviously not NJS! They're not easy to get since Planet-X ran out of the cheap stock they had a year ago, hence the Mirage hack. Total cost of the Mirage cranks + Goldtec ring + Stronglight single bolts + Record UT cups + milling by my local machine shop came to about £120, which is less than anybody is selling new Omniums for even when you can find them in stock.

The Campag UT bearings are available at a reasonable price as a Campag spare part, and AFAIK at least one of the bicycle bearing shops is doing them now, but they're not a normal common size. That ID/OD combination usually comes in a 7mm width, but the Campag ones are 6mm and you can't fudge the issue. Campag aren't just being wilfully proprietory here, they needed to keep the bearings as thin as possible to maintain the Q-Factor

Re: Omniums - High On Bikes are doing the chainset **and **BB for about £125. Shame I missed out on the PX offer.
http://cgi.ebay.co.uk/Truvativ-Omnium-Track-Single-Speed-Chainset-165mm-BB_W0QQitemZ360153606579

Thanks for the info on the bearings.