The athena 11s centaur and veloce groupsets feature the power torque system the new solution was immediately applauded and embraced with enthusiasm thanks to the incredibly high level of performance found in these mid range groupsets as well as the ease of use and the high reliabilitythe axle is a single piece firmly fixed to the right crank of the crankset the perfect coupling between bottom bracket and left crank is assured by the special geometry of the two components a solution that g