We always knew that smoother was faster but before the all new roubaix expert we couldnt have imagined just how much faster it actually is the frame is the lightest that weve ever made and its been constructed from our fact 10r carbon fiber its stiffness levels are also off the charts and compared to the sl4 iteration of yesteryear youll experience a whole new faster and more efficient geometry through some engineering sorcery however weve managed to keep the same fit feel and