Why? Saving .5lb is that important?I'm glad those are finally available, but wish Revved rear ends were available for the rest of the bikes. Especially Megatrail. This summer will mark year 2 on my GG, which is when I like to flip frames/bikes in order to get the best value. A Revved Megatrail rear (ideally with 27.5/MX flip chip) would satisfy that urge for another year or two.