I have been using a pair of Topolino's on my climbing bike. These are 1400g/pair and DO NOT have a weight limit. Very sturdy wheels that spin-up very quickly. I put a Veloflex Record (130g) on the fron wheel, a Veloflex Pave (180g) on the rear and a set of Continental Supersponic tubes (50g/each) on these wheels. The total weight is hard to beat. I ride Ksyriums SSCs on my second bike and rate the Topos at least as stiff!