From the article by Chris Foster and Jonathan Blyer:

$2,900, Shimano 105 11-speed mix, mechanical disc brake

A2 Bikes was one of the original pioneers when it came to direct-to-consumer bike sales. With the introduction of its excellent budget-priced carbon bike, the Speed Phreak, A2 became synonymous with cutting out the middleman to get a really great bike for less. In the years since, A2 brought on a former head Cervelo engineer to design their all-disc SP line, and though you can’t find an A2 bike for under $2,000 anymore, the new SP 1.1 is still a killer mechanical disc setup for under $3k with better fit options and aerodynamics than the original.

See the full article here.