I'm still using the Nylon SPD pedals with flat end. I routinely check the SPD hardware to make sure everything is tight. I'm okay with these because I've scraped them up so many times from rocks, falls and/or leaning too low on corners. It's easy just to sand off the scruff'ed bits and make them look new again! Also when moving my bike around, the nylon is more forgiving when it bangs up against stuff.