RR 411 db asymmetric - Asymmetric Road Bike Rim The most advanced alloy existing for rims meets the most advanced rim profile to form the RR 411 rim. From the moment the alloy is melted all the way to the secret surface treatment, this rim is all about getting the absolute best out of the great, shiny metal that is aluminum. Very light, very strong, very classy is the result. Due to its asymmetric design it allows to build wheels with even tension, making for an even crispier ride. And being disc brake specific brings down the weight even further while staying all black to score high on style points.