The ONLY reservation that I would have would be the Kreitlers are 4.5" which would be quite a low resistance. I got a set of the Performance rollers last week and have used them 3 times. First time having rollers. Much better than the trainer but I see it as a totally different type of workout. For me, it's more of a technique type thing. I just can't get in a full on sprint or do a power interval on rollers. At least not yet. I still like my Cycleops fluid trainer for that. So, if you're wanting to use your rollers for tempo, muscular, or anaerobic workout you may be out of luck with that large a diameter. But, like I said, I'm a total roller noob.