Now in stock. An aluminum frame that feels like carbon, dropper post included, and awesome suspension, what's not to love? The Fuel EX 7 offers great performance at an even better price. Freshly updated for 2017, the Trek Fuel EX gives the rider the performance of a long travel trail bike with the peppy ride feel of an XC rig. With a host of new features, Trek has compromised nothing in providing one do-it-all mountain bike.