Marlin 4 S 27.5 Blue Sage

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.

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 aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum 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.

Frame	Alpha Silver Aluminum, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew
Fork	SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel
Tire	Bontrager Montrose Comp, wire bead, 30 tpi, 27.5x2.4''
Hub Front	Formula DC-20, alloy, 6-bolt, 100x5mm
Hub Rear	Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5mm
Rim	Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve
Skewer Rear	173x5mm QR
Shifter	Shimano M315, 8 speed
Rear Derailleur	Shimano ESSA U2000
Crank	ProWheel alloy, 30T narrow-wide steel ring, 170mm length
Cassette	Shimano HG300, 11-45, 8 speed
Chain	KMC Z8.3, 8 speed
Brake	Tektro HD-M276 hydraulic disc // Tektro HD-M276 hydraulic disc // Power BH-M286TF hydraulic disc, 160mm rotor // Power BH-M286TF hydraulic disc, 160mm rotor
Brake Rotor	Tektro, 6-bolt, 160mm
Pedal	nylon platform
Saddle	Bontrager Verse Short, stainless steel rails
Seatpost	Bontrager alloy, 31.6mm, 12mm offset, 330mm length
Handlebar	Bontrager alloy, 31.8mm, 15mm rise, 720mm width
Stem	Bontrager Comp, 31.8mm, 7 degree, 35mm length
Headset	Semi-integrated, 1-1/8''
Grips	Trek Line Comp, nylon lock-on

Geometry Chart

B B Drop	4.5
B B Height	31.3
Chainstay Length	43.3
Eff Seat Tube Angle	74.0°
Eff Top Tube	57.9
Frame Reach	41.5
Frame Size Letter	S
Frame Size Number	15.5"
Frame Stack	57.2
Head Angle	66.5°
Head Tube Length	10
Offset	4.2
Seat Tube	37
Seat Tube Angle	73.8°
Standover	69.2
Trail	11
Wheelbase	112.1
Wheel Size	27.5"