This is one of specialized's best models an awesome bike that runs so fast. Perfect for a beginner or expert alike it handles and rides like a dream. One or the lightest production bikes ever created this is great for climbing or riding fast. This bike comes with a 48/35 chain rings and 10/33 Sram Red cassette. everything else is Sram Force Components! this bike will be offered with the (19' model) Zipp Firecrest disc brake rims which are so fast and light and better than the later year Firecrest rims. They fit just about anything and have a cinching for tubeless tire beads and internal width. They cut through the air and provide aero improvements because the tire wall sits right near the side wall of the rim. They are great in cross winds and very stable! you can find these rims online for 900 or more a piece. Also offered is Ceramic Speed coated bottom bracket CSp Derailler pulley wheels, CSp upgraded wheel bearings front and back, quark power meter, titanium/carbon quick play pedals, super light Sworks specialized carbon bottle cages, Pirelli Pzero TLR race tubeless tires. This bike is so fast you will feel the Ceramic Speed upgrades no matter what people say! i would hope so because these products on this bike in particular recently cost me $2k (in 24'). all in all there is about $6k - $7k in additional improvements that I have spent for this bike and I will include the alternative wheel set Roval CL Alpinist with tubless race tires, additional set of disc brakes, DTSwiss hubs, and Sram Force 10-33t cassette (with spacers for improved shifting). this bike is a gliding climbing monster it looks as fast as it rides perfect for any serious cyclist looking to have something that is dialed for additional speed!