Tubbies, shoudlve been in the museum by now due to technological advancement and the design of clinchers..However still 95% of Pros are racing on tubulars, due to the better rolling resistance,higher pressures,comfort,handling characteristics,and weight savings(due to most current tubular rims now being carbon) They are definitely more comfortable, due its mere design. i.e Tube in an enclosed casing [without any restrictive sidewall bead as in clinchers] , fixed(glued) to a rim. Also due to this design, pinch flat punctures are non-existent in tubbies. HOWEVER , puncturing otherwise is a pain, and if not fixed by sealant,requires a new tyre:( i have both,they weigh identical,and are both high end race wheels, but the tubbies are just faster,more responsive and more comfortable.. at least this is what they feel like.. whether they make a difference to race times.. dont think so.. and the $$ is probably NOT justifiable.
