RR 511: a rim for every terrain, as versatile as it is tough! The RR 511 is the ideal rim for anyone looking to build an ultra-stiff, reliable wheel. Thanks to its aluminium alloy and advanced surface treatment, this semi-aero rim with 32 mm deep sidewalls is both very strong and incredibly light. If you plan to use it on unsurfaced tracks or for cyclocross, simply fit tubeless tyres using the dedicated rim tape.