Why do some of you insist on using tiny 140mm brake rotors on gravel bikes, claiming its all about weight savings and improved aesthetics, when in reality, its just a recipe for disaster? Dont you realize that bigger rotors, like 160mm or even 180mm, would provide significantly better heat dissipation and stopping power, especially when riding in hilly or mountainous terrain with heavy loads? Its not like the extra few grams of rotor weight are going to make a noticeable difference in your overall bike weight or affect your climbing performance.
And whats with the notion that smaller rotors are more road bike-like and therefore more desirable? Newsflash: gravel bikes are not road bikes, and they require different design considerations. Were not talking about shaving off precious seconds on a smooth, paved criterium course here; were talking about navigating rough, unpaved roads and trails with varying levels of traction and control.
And have you ever actually tried to stop a fully-loaded gravel bike on a steep, gravelly descent with those tiny 140mm rotors? Its like playing a game of roulette, hoping that your brakes will actually work as intended. Meanwhile, those of us who opt for larger rotors can actually enjoy the ride without worrying about whether our brakes will fail us when we need them most.
Its time to rethink the conventional wisdom on brake rotor size for gravel bikes and prioritize actual performance and safety over superficial concerns about weight and aesthetics. So, whats the real-world experience with different brake rotor sizes on gravel bikes? Are larger rotors really worth the perceived weight penalty, or am I just a paranoid pessimist?