Regarding the messenger ring.. I don't like mine. It's tough, thick, and heavy, but the teeth are shaped such that the valleys are flat (like \_/ vs. U kinda), so it's actually noisy. Only chainring I've ever had noise with (cogs are a different story). If you don't care about noise, it's one helluva chainring. Although I think you can only get it in 46 and 48T.