I just came across a preview video for the Altra Superior, which will be the second trail running shoe in Altra's lineup alongside the Lone Peak. Based on the information provided in the video, the Superior weighs in a few ounces less than the Lone Peak, has a zero drop sole (19mm stack height according to iRunFar), and has a removable rock plate. Lack of flexibility has been a complaint about the Lone Peak, so hopefully the latter feature will improve the Superior in this area. The Superior should be available later this month - it's available for pre-order at Patton Gleason's Natural Running Store.
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