Cannondale Carbon F-SI Frame (2018) (Size Large/19) BRAND NEW. BRAND NEW 2018 Cannondale Carbon FSi XC Mountain Bike Frame. The frame is crazy light, fits a 1.5 taper steerer tube, has a 135QR rear end (with Ai offset dishing) and press fit BB. The item “Cannondale Carbon F-Si Frame (2018) (Size Large/19) BRAND NEW” is in sale since Wednesday, November 4, 2020. This item is in the category “Sporting Goods\Cycling\Bicycle Frames”. The seller is “drewster5803″ and is located in South Lyon, Michigan. This item can be shipped to United States.