The North Sails Speed Guide and Tuning Guide are essential resources for sailors looking to optimize their performance on the water. The Speed Guide offers valuable insights on boat speed, covering everything from sail trim to rig tuning, while the Tuning Guide provides detailed instructions on rig setup, sail selection, and more. Whether you're a seasoned racer or a new sailor looking to improve your skills, these comprehensive guides are a must-have resource. Trust North Sails to provide the expertise and support you need to achieve your racing goals and enjoy your time on the water.