The FutureShock system relies on a cartridge between the stem and the steerer that allows the cockpit to move in response to road input. According to Specialized, Terpstra requested a rigid component so his handlebars did not move, so Specialized developed such a piece. A pre-production rigid cartridge ultimately made it onto Terpstra’s bike due to a communication error. This cartridge was not approved for racing use. Quick-Step’s seven other riders used the non-rigid FutureShock system during the race.