Pair an irrational appreciation for speed with the unmatched versatility of being able to run a traction-loving 29-inch front wheel and a snappy 27.5-inch rear, and you have the fastest, most capable Demo to date. The Specialized Demo Expert Downhill Bike adds planted, confident control to the mix with an assist from RockShox’s BoXXer Select 29 fork featuring their DH DebonAir spring and a Super Deluxe Select Coil shock offering external rebound adjustment. Should your riding style or terrain require, the Demo's adjustable rear drop outs mean 29-inch rear wheel compatibiity is on deck, ready to deliver.  The Demo Expert M5 alloy frame is fully optimized to take advantage of the traction benefits of a 29-inch front wheel and the increased manueverability of a 27.5-inch rear wheel while maintaiining the ability to change your rear wheel size to 29-inch to suit different terrain and riding styles with adjustable dropouts that ensure chainstay length and bottom-bracket height stay dialed no matter the hoop size. The Rockshox Super Deluxe Select DH coil shock may be heavy on adjectives, but it’s even heavier on performance, offering external low speed compression and rebound adjustment while the Trunnion mount offers extra bushing overlap for increased durability Specialized Demo Expert Downhill Bike 2021 Features FRAME M5 alloy, Style-Specific DH Geometry, horst pivot flip chip for 27.5 or 29 rear wheel,148mm rear spacing, sealed cartridge bearing pivots, replaceable derailleur hanger, 200mm of travel REAR SHOCK RockShox Super Deluxe Select Coil, external rebound adjust, Trunnion mount, 225x75 FORK RockShox BoXXer Select 29, DH DebonAir spring, adjustable low-speed compression, adjustable rebound, short crown, 20x110mm thru-axle, 56mm offset, 200mm of travel