The Primary Schwinn Mtb's 21 speeds with twist shifters and a mountain bike rear derailleur supply fast gear changes. None of Schwinn’s mountain bikes are made for professional or critical hobbyists who wish to go off-road frequently. As such, your Schwinn S29 bike, for instance, is not going to take the abuse or perform in addition schwinn mountain bike to a top-of-the-line MTB’s like the Diamondback Scapegoat Full-Suspension MTB that prices over 3k. But, a Schwinn mountain bike will get you where you want to go and allow you to ride over locations apart from paving roads. Up front, you’ll find a Schwinn branded suspension fork with 100mm of travel and a mechanical lockout. However, you will be disappointed with it, if you want to take it off-road in tough terrain. Curious how they will hold up over time or if they're appropriate with Shimano/SRAM for the inevitable repair? The evaluation over on Singletracks famous that the take a look at bike had a broken B screw mount right out of the box.