Marlin 4 | Trek Bikes

Overview

You want an introductory mountain bike at an incredible price, but also want a commuter that's rugged enough to hop curbs on the way to class.

A lightweight aluminum frame with internal routing to protect your cables and add to the bike's sleek look, 21 speeds, a wide range of gearing so you always have the right gear for your terrain, powerful mechanical disc brakes, and a suspension fork that takes the edge off bumps and rough terrain.

Marlin is made for any adventure. The rack and fender mounts make it a great choice for commuters who want to get a little rad on the way to class or the grocery store.

It's a real mountain bike that's also perfectly suited to daily commutes, rides around campus, or just getting from A to B on any surface
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

"Unlike some bikes on the cheap end of the spectrum that cater to the recreational user, this one is aimed firmly at entry-level riders who want a bike that's affordable yet capable of riding and racing hard."

2023

Marlin 5

$739.99

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Marlin Frameset Gen 2

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2022

Marlin 8

$1,329.99

2022

Marlin 7

$1,029.99

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$849.99

Do this quick pre-ride safety check before you hit the trails.

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Features

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.

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.

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.

Chainstay mounts make it easy to install a rear kickstand that stays out of your way and supports bikes of all sizes. No more laying or leaning.

Going for a long ride? Rack mounts make carrying accessories a breeze.

Bontrager stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.

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We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.

Reliable stopping power in all conditions, including wet and muddy.

Specs

*Please note - spec applies to all sizes unless listed separately

*Frame	Size: XS , S , M , ML , L , XL , XXL Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR
*Frame	Size: XS , S Alpha Silver Aluminum, low standover, 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 , XXL 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)

Hub front	Formula DC-20, alloy, 6-bolt, 5x100mm QR
Hub rear	Formula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel, 135x5mm QR
*Rim	Size: XS , S Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve, Black
	Size: XS , S , M , ML , L , XL , XXL Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve
	Size: M , ML , L , XL , XXL Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
*Tire	Size: XS , S Bontrager XR2 Comp, wire bead, 30 tpi, 27.5x2.20''
	Size: M , ML , L , XL , XXL Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.20''
	Size: M , ML , L , XL , XXL Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.00''
Max tire size	Frame: 29x2.20" (XS & S: 27.5x2.4") Fork: See manufacturer

Shifter	Shimano Altus EF500, 7 speed
Front derailleur	Shimano Tourney TY300, 34.9mm clamp, down swing, down pull
Rear derailleur	Shimano Tourney TY300, long cage, 34T max cog
*Crank	Size: XS , S , M Shimano Tourney TY301, 42/34/24, 170mm length
*Crank	Size: ML , L , XL , XXL Shimano Tourney TY301, 42/34/24, 175mm length
*Bottom bracket	Size: XS , S , M , ML , L , XL , XXL VP BC73, 73mm, threaded cartridge
*Bottom bracket	Size: XS , S , M , ML , L , XL , XXL Sealed cartridge, 73mm
Cassette	Shimano TZ500, 14-28, 7 speed
Chain	KMC Z7, 7 speed
Pedal	VP-536 nylon platform
Max chainring size	1x/2x: 34T, 3x: 42T

Saddle	Bontrager Arvada, steel rails, 138mm width
*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 , XXL Bontrager alloy, 31.6mm, 12mm offset, 400mm length
*Handlebar	Size: XS , S Bontrager alloy, 31.8mm, 5mm rise, 690mm width
*Handlebar	Size: M , ML , L , XL , XXL Bontrager alloy, 31.8mm, 5mm rise, 720mm width
Grips	Bontrager XR Endurance Comp, lock-on
*Stem	Size: XS Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 50mm length
	Size: S Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length
	Size: M Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length
	Size: ML , L Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 80mm length
	Size: XL , XXL Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 90mm length
Headset	Semi-integrated, 1-1/8''
*Brake	Size: XS , S , M , ML , L , XL , XXL Tektro MD-M280 mechanical disc, 160mm rotor
*Brake	Size: XS , S , M , ML , L , XL , XXL Tektro MD-M281 mechanical disc, 160mm rotor

Weight	M - 14.40 kg / 31.75 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.

Sizing

Geometry

All measurements provided in cm unless otherwise noted.

Sizing table
Frame size number	Frame size letter	Wheel size	A — Seat tube	B — Seat tube angle	Effective seat tube angle	C — Head tube length	D — Head angle	E — Effective top tube	F — Bottom bracket height	G — Bottom bracket drop	H — Chainstay length	I — Offset	J — Trail	K — Wheelbase	L — Standover	M — Frame reach	N — Frame stack
13.5"	XS	27.5"	34.3	73.5°	73.5°	9	69.3°	54.4	29.2	5.8	43.8	4.2	8.8	104.9	65.8	37.6	56.5
15.5"	S	27.5"	36.8	73.5°	73.5°	9	69.3°	55.5	30.2	4.8	43.8	4.2	8.8	106.6	68.6	38.5	57.4
17.5"	M	29"	41.9	71.9°	73.0°	9	69.5°	60.2	31	5.8	43.8	4.2	9.3	110	74.8	41.8	60.2
18.5"	ML	29"	44.4	71.9°	73.0°	9	69.5°	61.8	31	5.8	43.8	4.2	9.3	111.6	75.8	43.4	60.2
19.5"	L	29"	47	71.9°	73.0°	10	69.5°	63.8	31	5.8	43.8	4.2	9.3	113.7	75.7	45.1	61.1
21.5"	XL	29"	52.1	71.9°	73.0°	12	69.5°	65.9	31	5.8	43.8	4.2	9.3	115.9	76.9	46.6	63
23.0"	XXL	29"	55.9	71.9°	73.0°	12	69.5°	67.3	31.1	5.8	43.8	4.2	9.3	117.3	80.4	48	63

Service

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"Look fast, feel fast, go fast."

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Rear kickstand mount

Rack mounts

Blendr stem

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Internal cable routing

Mechanical disc brakes