Trek Marlin 4 Gen 2 27.5" Bike (2025)

Trek Marlin 4 Gen 2 27.5" mountain bike in red from 2025. Trek reference: 5301841

The Marlin 4 is the ideal bike to start mountain biking, allowing you to easily transition from paths to trails. It’s perfect for riders who want a mountain bike equipped with knobby tires that can also be used for city commuting. Disc brakes, front suspension, a 14-speed Shimano shifter, and mounts for racks and fenders make this bike ideal for both beginner trail riders and students commuting to college.

Frame Set

• Frame: Alpha Silver Aluminum, internal routing for shifter and dropper post, rack and kickstand mounts, and ThruSkew thru-axle 135x5 mm
• Fork: SR Suntour XCE 28, spring, preload, hydraulic lockout, 46 mm offset for 29" wheels, 100 mm quick-release, 100 mm travel
• Maximum fork travel compatibility: 120 mm

Wheels

• Front hub: Formula DC-20, alloy, 6-bolt, 5x100 mm QR
• Rear hub: Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR
• Rim: Bontrager Connection, double wall, 32 holes, 20 mm width, Schrader valve
• Tire: Bontrager XT3 Comp, wire bead, 30 tpi, 29 x 2.40"
• Max tire size: Frame: 29x2.40"; Fork: See manufacturer

Drivetrain

• Shifter: Shimano U4000, 9-speed
• Rear derailleur: Shimano Tourney TY300
• Crankset: Prowheel TM-CY10, 36/22, 170 mm length
• Bottom bracket: VP BC73, 73 mm, threaded cartridge
• Cassette: Shimano TZ500, 14-34, 7-speed
• Chain: KMC Z7, 7-speed
• Pedal: VP-536 nylon platform
• Max chainring size: 1x: Check FAQ, 2x: 36T, 3x: 42T

Components

• Seat post: Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
• Saddle: Bontrager Verse Short, stainless steel rails
• Handlebar: Bontrager aluminum, 31.8 mm, 15 mm rise, 750 mm width
• Grips: Bontrager XR Endurance Comp, lock-on
• Stem: Bontrager Comp, 31.8 mm, Blendr compatible, 7 degrees, 50 mm length
• Headset: Semi-integrated, 1-1/8"
• Brake: Tektro MD-M281 mechanical disc, 160 mm disc
• Brake disc: Tektro, 6-bolt, 160 mm
• Max disc size: Frame: 180 mm (XXS: 160 mm); Fork: see fork manufacturer

Weight

• Weight: M - 14.60 kg
• Weight limit: This bike has a maximum weight limit (combined weight of bike, rider, and cargo) of 136 kg.