Decided to plunk down for an wheelset after one season on the Mavic Ksyriums that came stock on my Ridley Helium SLX. (Be sure to use the rubberized valve extenders as that can cause some subtle rattling with longer valve on tubed setups.). Definitely, feel that for longer time trials my average speed is up 0.5-1.25 mph over last season even though I am about 1700 miles behind 2018s pace. Customer support and warranty for Enve made the choice a no-brainer.