£ 199.99 ||| $ 274.99
Aiming to strike a balance between low weight, high sti fness and comfort, the Ballista has an ergonomicallyoptimised shape and a fused, rather than a stitched, upper. Bontrager is aiming for slipperlike comfort with these shoes. A two-way adjustment Boa is unusually placed on the heel of the shoe, which draws the foot down and back and locks the heel in place. This it and the very sti f carbon sole should combine for excellent power transfer.