It'll give you all the watts you give it, give you a boost when you restart and it's light enough to get you to the summit in no time. This is the result of many years of work and continuous research into performance in close collaboration with the Groupama-FDJ team. And it's alongside riders like Thibaut Pinot and facing mythical climbs like Izoard, Angliru or Stelvio... that we've reinforced the climber's temperament of our Xelius SL.