I saw a link years ago that discussed Boralyn and its original use in NASA projects. Univega did make 2 sets of Boralyn bikes - a regular and a "light" version in both MTB and road. The only problem was that the light version tended to crack after only a few years of riding.

Lucky for me, a local shop was closing and I was able to score this frame for $65 cash, BRAND NEW. As built, it is only 22.1 lbs and that is official. The ride is simply amazing - it floats over stutter bumps and is 4x smoother than my titanium bike, 10x smoother than my carbons. Only problem, it takes a 26.4 post (not the most common, but found an old Syncros to fit - how classic is that?).

If you can find a boralyn framset - GET IT. Amazing material!!!

As for the old Univega company - they went broke (now selling through Germany, I beleive). Costs on the Boralyn frames were over $1,000 and the R&D put them in the hole (sound like GT or Schwinn lately.....?).

Click on the attachment for a detailed view of the ride. XT/XTR-9 build, Mars Elite, Hugi Wheelset

Finally, Specialized's M2 "metal matrix" was nothing more than glorified aluminum. I have one of those too, not worth going into detail on it.

Final, final note - don't lick the frame or eat the flakes of material. The frame is carcinogenic if ingested. That's a real pleasant thought when wrenching a tight BB, pressing a HS, or stuffing a seatpost - watch for those shavings...!