When I had ITB Syndrome a couple of years ago, I remember reading that in some cases unlimited float pedals like Speedplay could contribute to that for some folks. In other folks, the lack of float is a problem for knees. I've switched to Zeros recently and found (well, at least before my accident, I found) that I gained some speed and control thanks to the much smaller amount of float I could set, especially out of the saddle climbing. All that Speedplay X-Series float allowed my feet to wiggle around way too much, especially when tired or climbing, and I guess I lost some power that way. Also hit my heels on the crankarms from time to time. But we're all very different - some people's knees just gotta have the large amount of float. Mine don't. I think the main point is to remember that more float isn't either good or bad; it all depends on the rider.
Emily
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow