Marlin takes its cue from light, fast XC bikes. The right wheel size for each frame size, performance pedigree, and unbeatable ride feel make Marlin the perfect trail rider. When you’re ready for longer days on the bike, bigger challenges on the trail, and all the fun of the full mountain biking experience, you’re ready for Marlin. Ride the fastest wheel that fits with Smart Wheel Size. Ride-tuned aluminum frame is XC light, mountain tough and extended size range gives you a better fit for a better ride.Backed by Trek’s limited lifetime warranty.