Marlin 4 Gen 3

• Frame: Alpha Silver Aluminium
• Fork: SR Suntour XCM 30, 110 mm
• Wheels: Bontrager Connection

Marlin 4 is a trail-worthy daily rider that's perfectly suited for everyday adventures, on and off the trail. It features a trail-savvy frame with a suspension fork, 8-speed Shimano ESSA shifting and mounts for a rack and kickstand that make it an ideal choice for trail riders or anyone looking for a comfortable, stable commuter with the ruggedness of a real mountain bike.

FEATURES

Will my bike have a curved top tube?

Smaller frames have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frame sizes have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.

Fit for every rider

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 smallest sizes even come with short-reach brake levers and narrower handlebars that give smaller riders better comfort and control.

High tech, high value

Marlin looks and feels great. It’s packed with features usually found only on more expensive bikes, like a stylish frame with internal shift cable and brake hose routing, which can help your cables last longer by protecting them from the elements.

Shimano CUES

Inspired by rider demand for trouble-free drivetrain longevity and performance, Shimano CUES offers a new foundation for versatility and durability across a range of both electric and standard bikes. CUES features Shimano’s new LINKGLIDE drivetrain technology for significantly increased life on wear items like chain, cassette and chainrings.

A better way to produce aluminium

Starting in 2024, we began removing high-emission aluminium from our manufacturing and replacing it with low-emission aluminium made with renewable energy. By October 2025, nearly every alloy bike we make – this one included – had made the switch, driving a major drop in our footprint.

Shimano LINKGLIDE

LINKGLIDE technology has been specifically engineered for incredible durability while still delivering smooth and decisive shifting – along with a great pedalling experience. Available exclusively on Shimano CUES drivetrains.

Upgrade your pedals and love your bike more

Pedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.

SPECS

Frameset

• Frame:
  • Size: XXS , XS - Alpha Silver Aluminium, curved top tube, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew
  • Size: S , M , ML , L , XL , XXL - Alpha Silver Aluminium, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew
• Fork:
  • Size: XXS - SR Suntour XCM 30, coil spring, lockout, preload, 100 mm QR, 100 mm travel, 26" wheel
  • Size: XS - SR Suntour XCE 28, coil spring, preload, 42 mm offset for 27.5" wheel, 100 mm QR, 80 mm travel
  • Size: S - SR Suntour XCE 28, coil spring, preload, 42 mm offset for 27.5" wheel, 100 mm QR, 100 mm travel
  • Size: M , ML , L , XL , XXL - SR Suntour XCE 28, coil spring, preload, 46 mm offset for 29" wheel, 100 mm QR, 100 mm travel

Wheels

• Hub front: Formula DC-20, alloy, 6-bolt, 100x5 mm
• Skewer front: 116x5mm QR
• Hub rear: Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm
• Skewer rear: 173x5 mm QR
• Rim: Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
• Tyre:
  • Size: XXS - Bontrager Montrose Comp, wire bead, 30 tpi, 26x2.35''
  • Size: XS , S - Bontrager Montrose Comp, wire bead, 30 tpi, 27.5x2.40"
  • Size: M , ML , L , XL , XXL - Bontrager Montrose Comp, wire bead, 30 tpi, 29x2.40"
• Max tyre size: Frame: 29x2.40" (XXS: 26x2.40", XS & S: 27.5x2.40"), Fork: See manufacturer

Drivetrain

• Shifter: Shimano M315, 8-speed
• Rear derailleur: Shimano ESSA U2000
• Crank:
  • Size: XXS , XS - ProWheel alloy, 30T narrow-wide steel ring, 160 mm length
  • Size: S , M , ML - ProWheel alloy, 30T narrow-wide steel ring, 170 mm length
  • Size: L , XL , XXL - ProWheel alloy, 30T narrow-wide steel ring, 175 mm length
• Bottom bracket: Threaded cartridge
• Cassette: Shimano HG300, 11-45, 8-speed
• Chain: KMC Z8.3, 8-speed
• Pedal: Nylon platform
• Max. chainring size: 1x: See FAQ, 2x: 36T, 3x: 42T

Components

• Saddle: Bontrager Verse Short, stainless steel rails
• Seatpost:
  • Size: XXS - Bontrager alloy, 31.6 mm, 12 mm offset, 300 mm length
  • Size: XS , S , M - Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
  • Size: ML , L , XL , XXL - Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
• Handlebar:
  • Size: XXS , XS - Bontrager alloy, 31.8 mm, 5 mm rise, 690 mm width
  • Size: S - Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width
  • Size: M , ML , L , XL , XXL - Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
• Grips: Trek Line Comp, nylon lock-on
• Stem:
  • Size: XXS , XS , S - Bontrager Comp, 31.8 mm, 7-degree, 35 mm length
  • Size: M , ML , L - Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length
  • Size: XL - Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 60 mm length
  • Size: XXL - Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 70 mm length
• Head set: Semi-integrated, 1-1/8''
• Brake:
  • Size: XXS , XS , S - Tektro HD-M276 hydraulic disc
  • Size: XXS , XS , S , M , ML , L , XL , XXL - Power BH-M286TF hydraulic disc, 160 mm rotor
  • Size: M , ML , L , XL , XXL - Tektro HD-M275 hydraulic disc
  • Size: M , ML , L , XL , XXL - Power BH-M286TF hydraulic disc, 180 mm rotor
• Brake rotor:
  • Size: XXS , XS , S , M , ML , L , XL , XXL - Tektro, 6-bolt, 160mm
  • Size: M , ML , L , XL , XXL - Tektro, 6-bolt, 180mm
• Rotor size: Max brake rotor sizes - Frame: 180mm (XXS: 160mm), Fork: see fork manufacturer

Weight

• Weight: M - 14.90 kg / 32.85 lbs
• Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).

SIZING

GEOMETRY

All measurements provided in cm unless otherwise stated.