For a while now the pro peleton's choice for the spring bike destorying classic in Flanders has been the Ambrosio Nemesis rim althoug now a greater number of carbon rims are seen. This rim is 490g and is quite stif for a shallow rim. It's 21mm width helps here. It is a tubular rim because on cobble tubulars tyre are the best.

This wheelset is built using Campagnolo record hubs, and black Sapim Race spokes as was shipped to a rider in the armed force in Germany who will be riding Tour of Flanders and Paris Roubaix (as an amateur though). It is also my choice of rim for RVV. It is even a stiff wheel set.