The trek marlin 4 mountain bike 2018 combines performance and comfort with trekrsquos patented smart wheel size technology which ensures an incredibly accurate and personal framewheel fit enhancing comfort control and speed with a ride tuned aluminium frame this trek hardtail mountain bike is lightweight mountain worthy rugged and engineered to an ergonomic geometry that boosts performance and agility over a range of rough terrains trek marlin 4 mountain bike 2018 featuresnbsp