Shimano sora drivetrain the shimano 9 speed sora groupset is well known for its performance and durability making it the perfect choice for the conquest the sora shifters have the same dual control setup as the top end groupsets and also feature an optical window to show which gear you have selected shifting is precise and consistent right the way through the 9 speed cassette the fsa chainset and bottom bracket are stiffer and lighter than a standard square taper chainset with 46