A.K. will have a new single speed in time for the SSWC in Napa this summer. This 7005 frame came in at 3.5 lbs., even with the slider dropouts. This is probably the most up to date single speed I can produce.
Big Dean's 29er will not be underbuilt. The rear triangle has two yokes of 7005 billet designed by Mike Ahrens. Mike makes the best hardware for building aluminum bikes and has his own brand of bikes.