Fuel EX 9.9 is the single best choice for riders who want an all-mountain ripper that excels at everything from marathon races to burly technical terrain to singletrack;RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control;A sleek internal storage compartment gives you a versatile spot to stow tools and gear;We expanded our size range to ensure a better fit for all riders. And, you get the fastest wheel that fits your frame: XS frames get 27.5˝ wh