Unicorn wrote: Steveo, if you do a search I have posted about V-brake adaptors almost two years ago. I used Mission four bolt Magura V-brake addaptors. I gave information about the site and pictures of the adaptors. Roger has since stared to sell them. I have V-brakes mounted on my KH29 and they work fine. I must say though that I don't use them very much when riding cross country

skilewis74 wrote: Puting on calipers would be fairly easy & I think they can be had to fit up to a 2.3 tire. V-brakes would be stronger and allow a larger tire (but the frame prob won't) but 'these ' (http://www.unicycle.com/shopping/shopexd.asp?id=566)addaptors might not mount well on the AX's oval legs. Drilling a hole and putting on a caliper brake seems to be the consensus