Size 50 cm full carbon fiber frame and fork. Also has carbon fiber s work to seat post. This is the SL2 with the Shimano Dura Ace 20 speed components and it has upgraded Shimano Ultegra cranks. Mavic Aksyum Race wheels. The bike is an excellent very clean condition it was always stored inside of the house and only used on a personal trainer inside the house. Very clean! The bike originally was over $3,000 when it was new back in 2011 for 2012.