For this season I am hoping to find a good 130mm rear hub that I can use with spacers and a cog for singlespeed. I'm interested in finding either a lightweight bolt-on cassette hub, or a lightweight QR hub and converting it somehow. I have lots of questions regarding such, and am not entirely sure it will be worthwhile, but I think it might be.
Basically I'm tired of the crappy freewheels that I put on my flip-flop hub, and I think a cassette hub may have a better seal than the add-on freewheels. Plus, I think with the right hub, it could weigh less.
So my questions are:
-is there a good lightweight bolt-on hub that I've somehow missed?
-would it be possible to buy a longer axle and replace it on a Dura-ace hub? The 7700 "looks" like I could do that, but I haven't taken one a part.
-Could I do it to a dura-ace 7800, or a Campy Record? That would be super light/awesome.