RR 411: the best of rim profiles in the lightest of our welded alloy rims! The RR 411 brings together the best of alloys and rim profiles. From the moment the alloy is melted through to the secret surface treatment, its design has one sole aim: to get the very most out of that remarkable metal, aluminium. The result: a very light, very strong, very stylish rim. The RR 411 is available with a symmetric profile as well as an asymmetric profile.