the bleeding-edge rim design of the erc 1100'S but without the super premium dicut ceramic bearing hub and spoke system, bringing the price down to a more attainable level and adding a 15 mm front axle option the erc rims were designed from scratch in conjunction with former f1 head of engineering jp ballard and his team at the gst wind tunnel in immenstaad, germany using a bespoke fluid dynamic analysis system that for the first time allowed the designers to model and quantify the effect of crosswinds on a wheel'S handling a rim profile was developed that gives an optimal balance between aerodynamics and handling this is why the erc rim is precisely 47 mm deep and 27 mm wide, any wider and you'D see an unacceptable increase in drag, any deeper and you'D compromise handling in rough conditions, we call this concept aero+ and the result is a blindingly fast yet truly all conditions wheel dt'S renowned 240 hub internals are combined with a freshly optimised spline hub-shell desig