Surly Preamble Flat Bar Bike - 650b Skyrim Blue X-Small. Designed to introduce unfamiliar riders to Surly’s pavement and gravel line Preamble highlights Surly’s most essential features: Durable custom steel tubing a renowned ride feel and just the right mounts for running racks fenders and bottle cages. Available in flat-bar and drop-bar configurations it’s disc-brake specific and shares a single-position vertical dropout with Surly Bridge Club. For new weekend riders and veteran commuters Preamble makes it easier than ever to get out of the car and on top of tough and comfortable Chromoly steel.