i have the jamie roy and my friend is dealing the mark V out of his shop in denver. the mark V seems a bit heavy for what it is, but he has built several up without a hitch. my jamie roy went together smoothly as well. a picture of my bike is on the iro site, under the old gallery. it's also #738 on fixedgeargallery.com. the stays and the dropouts are shorter on the mark v than on the jamie roy. i like the looks of the mark v dropouts better; the drop outs on the jamie roy are unneccessarily long, imo. i would also like the frames better if they had 120mm spacing.

on the site i notice a guy apparently racing his in a velodrome. i took mine to the track and was scraping my 170's at slow speeds on the embankment, probably due to the non-track heigth bb. 165's would probably do the trick, but i am going to use a friend's matsuri track bike for racing until i get my custom ground up track frame built...

all in all, i love riding my bike.

-chris