Kittel makes history with Tour de France stage wins on disc brakes German wins four sprint stages on Specialized Venge ViAS Disc Share on Facebook Share on Twitter Share on Pinterest Share on Whatsapp Share on Reddit Email to a friend By Josh Evans Published: July 11, 2017 at 12:00 am Marcel Kittel’s history-making Specialized S-Works Venge ViAS Disc Ben Delaney / Immediate Media Marcel Kittel aboard his Venge Disc at the stage 2 sign on in Dusseldorf Josh Evans / Immediate Media Michael Matthews rode on the as-yet-unannounced Giant Propel Disc Josh Evans / Immediate Media A close look at the Shimano Dura-Ace R9170 levers Josh Evans / Immediate Media Kittel ran 140mm rotors front and rear