Yeah, as of now most use rim brakes, but the UCI just legalized disc brakes for use in competition, so I'm sure that'll change in the future. I think useing them makes perfect sense, as I assume they just work better in the dirt and I'd hope brake pads and tracks wouldn't wear out that quickly.
I'm looking into this topic more and more, and indeed most frames appear to take 130mm hubs, but especially with the ones that accept disc brakes you can't really be sure, it could be 135mm or something in between to be able to fit both.
I'm not too familiar with imperial measures and I could be wrong, but I think 28 (road/cross) and 29 inches (mtb) are actually the same, when it comes to rim and tire diameters, which I find a little strange. Can anybody confirm that?
So now I'm looking at rim widths and what tires you can use on each rim, like could I use a 33mm cross tire on a KinLin XD-230 disc rim which has an inner width of 17.5mm, or would it likely feel spongey or even roll off when run at a low pressures?
Does anyone know if there is a 28 (29?) inch disc specific tubular rim?
Stephen, 39 is definetly on the small side, and I wouldn't go out and buy it like that, but it's what I have. I could leave the 50t on and use the crank as a true triple setup, since the left shifter is a triple anyways, I'd just have to pick up a triple FD. But I think a bash guard would be cooler and I have a feeling a triple setup with a ton of dirt in it will just not work all that well. Also, I don't see myself useing a 50 in the woods, but I honestly don't know, that's why I'm asking.
Could be good to develop leg speed, too. This is not meant to be a full on race machine either, I just want to go out and have some fun. If I really like it, I can always upgrade stuff over time.
"Nothing compares to the simple pleasures of a bike ride," said John F. Kennedy, a man who had the pleasure of Marilyn Monroe.