Trek Marlin 4 2025. The marlin 4 is the gateway mountain bike that will take you from rail trails to singletrack. Marlin comes in seven frame sizes to suit riders of any height, and smart wheel size ensures you’re on the fastest wheel that fits.
The marlin 4 is the gateway mountain bike that will take you from rail trails to singletrack. The marlin 4 is a versatile mountain bike suitable for both trails and commuting.