Well just back from a ride. I timed myself for a flying kilo. Did a 1:10 with the 21s. They are Continental triathalon 250's. Best I did previously on the 28s, Schwalbe One's, was a 1:14.
Similar wheels. The Schwalbes are mounted on Mavic SSC rims and Campy small flange hubs. The Continentals on Mavic Monthlery rims Campy high flange hubs.
Last edited by big chainring; 05-28-18 at 11:24 AM.