2025 Trek Marlin 4 Gen 2 Aluminium Mountain Bike

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The 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 tyres that can double as a rugged commuter. Disc brakes, front suspension, Shimano 14-speed shifting and mounts for a rack and mudguards make this a great bike for trail riders and campus commuters alike.

$699.00

Description
Frame

Size: XS , S

Alpha Silver Aluminium, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135×5 mm QR

Size: M , ML , L , XL , XXL

Alpha Silver Aluminium, internal routing, chainstay disc-brake mount, rack and kickstand mount, 135×5 mm QR
*Fork

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

Hub front
Formula DC-20, alloy, 6-bolt, 100×5 mm
Hub rear
Formula DC-31, alloy, 6-bolt, 6/7/8-speed freewheel, 135×5 mm
Skewer rear
Rim
Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
Spokes
14 g stainless steel, black
*Tyre
Max tyre size
Frame: 29×2.20″ (XS & S: 27.5×2.40″), Fork: See manufacturer

*Shifter

Size: XS , S , M , ML , L , XL , XXL

Shimano EF500, 2-speed

Size: XS , S , M , ML , L , XL , XXL

Shimano Altus EF500, 7-speed
Front derailleur
Shimano Altus M315, 34.9 mm clamp, top swing, dual pull
Rear derailleur
Shimano Tourney TY300
*Crank

Size: XS , S , M

ProWheel TM-CY10, 36/22, 170 mm length

Size: ML , L , XL , XXL

ProWheel TM-CY10, 36/22, 175 mm length
Bottom bracket
VP BC73, 73 mm, threaded cartridge
Cassette
Shimano TZ500, 14-34, 7-speed
Chain
KMC Z7, 7-speed
Pedal
Max. chainring size
1x: See FAQ, 2x: 36T, 3x: 42T

Saddle
*Seatpost

Size: XS , S

Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length

Size: M

Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length

Size: ML , L , XL , XXL

Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
*Handlebar

Size: XS , S

Bontrager alloy, 31.8 mm, 5 mm rise, 690 mm width

Size: M , ML , L , XL , XXL

Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
Grips
*Stem

Size: ML , L

Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 70 mm length

Size: XL , XXL

Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 80 mm length
Head set
Semi-integrated, 1-1/8″
*Brake

Size: XS , S , M , ML , L , XL , XXL

Tektro MD-M280 mechanical disc

Size: XS , S , M , ML , L , XL , XXL

Tektro MD-M281 mechanical disc

Size: XS , S , M , ML , L , XL , XXL

Tektro MD-M280 mechanical disc, 160 mm rotor

Size: XS , S , M , ML , L , XL , XXL

Tektro MD-M281 mechanical disc, 160 mm rotor
Brake rotor
Tektro wave, 6-bolt, 160 mm
Rotor size
Max brake rotor sizes – Frame: 180mm, min 160mm, Fork: see fork manufacturer

Weight
M – 14.60 kg / 32.19 lb
Weight limit
This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).

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, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

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

Additional information
Size

L(29" wheel)

,

M(29" wheel)

,

ML(29" wheel)

,

S(27.5" wheel)

,

XL(29" wheel)

,

XS(27.5" wheel)

,

XXL(29" wheel)

Color

Crimson

,

Dnister Black

,

Matte Hex Blue

Brand

Trek

Condition

New

Adult

No

Age Group

Adult

Gender

unisex

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