Fast turns, sprinting or horrible rock gardens, a stiffer cockpit is neccessary for fast and hard riding. But it is not done with a stiff handlebar. The handlebar itself should have some small flex for symmetrical loads to increase comfort, but onesided loads should not make the system bend. There is no special spacer inluded, not required. The Intend Stiffmaster is designed to use NORMAL aheadspacers. 85g for 44mm 90g for 49mm 14mm stack height Suitable for ZS44 and ZS49 headtubes 3Nm bolt-torque 40% stiffness compared to normal headsets Made in Germany