What is the most effective method for inspecting gravel bike brake rotors for wear, and should manufacturers be held to a higher standard for providing clear, universally accepted guidelines for brake rotor wear limits, or is it the responsibility of the rider to develop their own inspection protocols through trial and error. Some argue that visual inspection and tactile examination of the brake rotor surface is sufficient, while others claim that precise measurements using calipers or other specialized tools are necessary to accurately assess wear. Does the lack of standardization in brake rotor wear inspection contribute to a higher risk of accidents and injuries, and should riders prioritize one method over the other to ensure optimal brake performance and safety.