Trek Marlin 4 Gen 2 Bike - 2025

TREK MARLIN 4 GEN 2 BIKE - 2025

Marlin 4 is the gateway mountain bike that will take you from rail trails to singletrack. It's ideal for riders who want a mountain bike with knobby tires that can double as a rugged commuter. Disc brakes, front suspension, Shimano 14-speed shifting, and mounts for a rack and fenders make this a great bike for trail riders and campus commuters alike.    

FEATURES

• Marlin Gen 2 is ready to roll with easy to use features that help you get the best bang for your buck
• Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter
• Smaller frame sizes (XS and S) have short-reach brake levers that make it easier and more comfortable for riders with smaller hands to brake confidently
• Marlin models in XS and S frame sizes have a curved top tube and a lower standover height that makes it easier for smaller riders to mount and dismount
• Like every model in the Marlin family, it's backed by Trek's lifetime warranty

TECH SPECS

Frameset

• *Frame
• Size: XS, S - Alpha Silver Aluminum, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR
• Size: M, ML, L, XL - Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR
• *Fork
• Size: XS - SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel
• Size: S - SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel
• Size: M, ML, L, XL - SR Suntour XCE 28, coil spring, preload, 46mm offset for 29'' wheel, 100mm QR, 100mm travel
• Max compatible fork travel: 100mm (XS & S: 490mm axle-to-crown, M & up: 509mm axle-to-crown)

Wheels

• Skewer rear: 152x5mm QR
• Max tire size: Frame: 29x2.20" (XS & S: 27.5x2.40"), Fork: See manufacturer

Drivetrain

• *Shifter
• Size: XS, S, M, ML, L, XL - Shimano EF500, 8 speed
• Size: XS, S, M, ML, L, XL - Shimano EF500, 7 speed
• Front derailleur: Shimano Altus M315, 34.9mm clamp, top swing, dual pull
• Rear derailleur: Shimano Tourney TY300
• *Crank
• Size: XS, S, M - ProWheel TM-CY10, 36/22, 170mm length
• Size: ML, L, XL - ProWheel TM-CY10, 36/22, 175mm length
• Bottom bracket: VP BC73, 73mm, threaded cartridge
• Cassette: Shimano TZ500, 14-34, 7 speed
• Chain: KMC Z7, 7 speed
• Pedal: VP-536 nylon platform
• Max chainring size: 1x/2x: 34T, 3x: 42T

Components

• Saddle: Bontrager Verse Short, stainless steel rails
• *Seatpost
• Size: XS, S - Bontrager alloy, 31.6mm, 12mm offset, 330mm length
• Size: M - Bontrager alloy, 31.6mm, 12mm offset, 360mm length
• Size: ML, L, XL - Bontrager alloy, 31.6mm, 12mm offset, 400mm length
• *Handlebar
• Size: XS, S - Bontrager alloy, 31.8mm, 5mm rise, 690mm width
• Size: M , ML , L , XL - Bontrager alloy, 31.8mm, 15mm rise, 750mm width
• Grips: Bontrager XR Endurance Comp, lock-on
• *Stem
• Size: XS, S - Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length
• Size: M - Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length
• Size: ML, L - Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 70mm length
• Size: XL - Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 80mm length
• Headset: Semi-integrated, 1-1/8''
• *Brake
• Size: XS, S, M, ML, L, XL - Tektro MD-M280 mechanical disc
• Size: XS, S, M, ML, L, XL - Tektro MD-M281 mechanical disc
• Brake rotor: Tektro, 6-bolt, 160mm

Weight

• Weight: M - 14.60 kg / 32.19 lbs
• Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Prices shown are manufacturer's suggested retail prices.

Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.

*Size Chart measurements are in cm unless otherwise noted