If you want to get the miles in but your streets aren39t covered with the finest tarmac and you prefer the inconspicuous function of your tyres then this is your tubular duraskin tyres with duraskin sidewall protection have to roll with the punches these tyres are used in the harshest conditions on messenger bikes on epic travel bikes crossing continents without wearing through and in professional cycling they have to endure tough tests such as paris roubaix the high quality polyamide