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. Difference to Intend Stiffmaster: There is no Intend spacer inluded, not required and they also do not fit here. The Intend Blackline Stiffmaster is designed to use NORMAL aheadspacers. The Stiffmaster headset IS a headset, you do not need another headset on the top to make the Stiffmaster fitFeaturesStack Height: 14mmCompatibility: Suitable for ZS44 headtubes (IS41/42 not planned)Bolt Torque: 3NmStiffness: Up to approximately 40% more stiffness compared to standard headsetsMfr Claimed Weight85g weight upper shell excl. spacer