video1.0<iframe src="https://www.loom.com/embed/04e8e61b50b14b90a7d08a1d780e3259" frameborder="0" width="1280" height="960" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>9601280Loomhttps://www.loom.com9601280https://cdn.loom.com/sessions/thumbnails/04e8e61b50b14b90a7d08a1d780e3259-71aa8a6d788141bf.gif1097.304This Loom emphasizes that string bed stiffness and effective stiffness matter more than reference tension when tuning tennis rackets for comfort and performance. The speaker explains effective stiffness as a calculated result of string and racket properties, noting that values approaching 30 indicate a very stiff setup and that they targeted an effective stiffness in the 26 to 27 range for a 95 square inch Dunlop CX200 Tour. They contrast RDC and Flex-4 readings (with examples like 43 vs 60) and argue that without measuring string bed stiffness, a tension number such as “52” or “42” is meaningless. The Loom also promotes their portable StringSense device, aiming for about $100, and mentions a string bed stiffness calculator available on racketquest.tennis.