No matter where you ride no road surface is perfect that39s why our ruby expert with ultegra di2 focuses on providing next level smoothness in a package that39s tailor made for women of all abilities the frame is among the lightest that we39ve ever made and it39s been constructed from our superlative fact 10r carbon fibre its stiffness levels are also off the charts and compared to the sl4 iteration of yesteryear you39ll experience a whole new faster and more efficient geometry