Hmm. I may give the 50 a try then I guess. I have a 50T DA ring in the mail coming to me. I was gonna get a 49 instead. I am a track virgin but I am in pretty good shape as I do quite a bit of weight training as a hobby and I have a background in BMX racing. those big gears seem to scare me for some reason haha. That's why I figured I would start with 49x15 as opposed to 50x15.