Trek Marlin Gen 3 Frameset

The Marlin frameset is a lightweight aluminium foundation ready to become the perfect laid-back trail bike. Modern geometry inspires more confidence than ever, helping you gain control and speed on singletrack.

• Alpha Silver aluminium frame

Highlights

• Even more sizes: With 8 different sizes, Marlin has a size for every rider. Each frame features Smart Wheel Size: XXS frames use 26” wheels, with wheel sizes increasing in proportion to frame size so every rider gets the right fit.
• Ready for trails, ready for upgrades: The secret to Marlin's popularity is a mountain bike frame designed specifically for trails and ready for upgrades, so it can grow with you as you tackle tougher, more technical routes.
• Ride confidently with Thru-Skew: Say goodbye to open dropouts. Thru Skewer is a better, stronger and more precisely aligned rear wheel attachment system that holds the wheel more securely than quick-release skewers while still using standard 135mm rear hub spacing.
• A better way to make aluminium: Starting in 2024, we began replacing traditional aluminium with aluminium with a lower carbon footprint, produced using renewable energy. By October 2025, nearly all aluminium bikes produced, including this one, had made the transition, significantly reducing our environmental footprint.

Technical specifications

• Weight limit: This model has a maximum total weight limit (combined weight of bike, rider and cargo) of 136kg.
• Maximum fork travel: 120mm, XXS: 80mm
• Rotor size: Maximum brake rotor size - Frame: 180mm (XXS: 160mm), Fork: see fork manufacturer
• Maximum tyre size: Frame: 29x2.40" (XXS: 26x2.40", XS and S: 27.5x2.40"), Fork: Consult the manufacturer's specifications

Trek was founded in 1976 in Waterloo, Wisconsin, by Dick Burke and Bevil Hogg and is still based in the same city today. It makes road, mountain, gravel, city and electric bikes to support different ways of riding. Its story began in a barn, with 904 steel touring frames produced in its first year.