The Formula Solid Disc Brake Rotor is one of the lighter solid 6-bolt rotors available. Drilled to optimize heat dissipation, reduce noise, and eliminate weight, these rotors offer smooth and consistent stops ride after ride. Formula also offers a separately available CenterLock adapter to run these rotors on a DT Swiss or Shimano hub equipped with the CenterLock interface.The easiest way to describe the difference of rotor sizing is that the larger the rotor, the heavier duty the application. In very general terms, 160mm rotors are for cross-country, 180mm for all-mountain and some freeride, and 203mm for freeride and downhill. But riding style, braking style, and rider weight should also go into the equation.Another common thing is to run a larger rotor up front. We see many bikes with a 180mm front rotor and 160mm rear. It makes sense; most of your braking power is on the front wheel. If you think you're a cross-country type but are almost a Clydesdale, try a 180 in front and 160 in the rear. Another good reason for a larger front rotor is if you live in a mountainous region where you have long descents. These are the 160mm rotors. Please choose the appropriate adaptor to fit your needs.The 160mm rotor weighs 87g, the 180 is 123g, and the 203 is 157g.
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