13 Flow Mk4 : The Best Quality Products. Unlike many rims, the bst asymmetric shape is designed to equalize resistance to dents and tire bead retention on both sides of the rim under extreme conditions. The flow mk4’s reinforced spoke bed, combined with the offset drilling of the asymmetric design, builds into an incredibly durable wheel that brings added confidence to every ride.
Unlike many rims, the bst asymmetric shape is designed to equalize resistance to dents and tire bead retention on both sides of the rim under extreme conditions. The flow mk4’s reinforced spoke bed, combined with the offset drilling of the asym design, builds into an incredibly durable wheel that brings added confidence to every ride. Durability and ease of tubeless setup has made the flow rim a staple since 2007, and this newest iteration.