Trek

2021 Trek Marlin 4

Previous used estimate

$250 - $258

Actual value depends on condition, size, and local demand.

2021 Trek Marlin 4

Value Guide market data · 2021 Trek Marlin 4

12-month projected trend

10%

Direction and magnitude, not judgment

vs. category average

1%

Drops faster than category avg

Price over time - 2021 Trek Marlin 4

$530$328$125MSRPMSRPYr 1Yr 2Yr 3Yr 4Yr 5Yr 6Yr 7Yr 7Yr 8Yr 9Yr 10Yr 11Yr 12Yr 13Yr 14Yr 14Yr 15Yr 16Yr 17Yr 18Yr 19Yr 20Yr 20

Values based on actual sales data. Enter your bike's specifics to get a precise valuation.

All Marlin model years

Overview

About this bike

Marlin 4 is the perfect gateway to trail riding. It's ideal for new riders who want a mountain bike with knobby tires that can double as a rugged commuter. Disc brakes, front suspension, 21 speeds, and mounts for a rack, fenders, and kickstand make this versatile ride an excellent entry point for new trail riders and campus commuters alike. It's right for you if... 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. Disc brakes, knobby tires, and 21 speeds make Marlin 4 a great choice. The tech you get Marlin 4 has 21 speeds with a wide range of gearing for easy riding on varied terrain. It's modeled after our higher-end mountain bikes and built with a lightweight Alpha Silver Aluminum frame that has internal routing to protect your cables, an integrated kickstand mount, mechanical disc brakes for increased stopping power in any weather conditions, and a suspension fork with 75mm of travel—just enough to absorb the big bumps and keep you cruising. The final word Marlin 4's greatest gift is its versatility. It's built-in Trek's mountain bike heritage and totally capable of taking on the trails. But it's an efficient daily rider, too. 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. Why you'll love it - 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. - The flat mountain-style handlebar and disc brakes keep you in control, on or off the trail. - Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter. - Internal cable routing makes it easy to spec your bike with upgraded trail tech, like a dropper post. - Like every model in the Marlin family, it's backed by Trek's lifetime warranty.

Specifications

Subtype
Cross Country
Category
Mountain
Component Fork
SR Suntour XCE 28, coil spring, preload, 100mm travel
Component Hubs
Front: Formula DC-20, alloy, 6-bolt Rear: Formula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel
Component Size
X-Small, Small, Medium, Medium/Large, Large, X-Large, XX-Large
Component Stem
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree
Product Family
Marlin
Component Axles
Front: 5x100mm QR Rear: 135x5mm QR
Component Chain
KMC Z7, 7 speed
Component Color
Matte Anthracite, Magenta
Component Frame
Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount
Component Brakes
Tektro MD-M280 mechanical disc
Component Pedals
VP-536 nylon platform
Component Saddle
Bontrager Arvada, steel rails, 138mm width
Component Cassette
Shimano TZ500, 14-28, 7 speed
Component Crankset
Shimano Tourney TY301, 42/34/24
Component Shifters
Shimano Altus EF500, 7 speed
Component Handlebar
Bontrager alloy, 31.8mm, 5mm rise
Component Seat Post
Bontrager alloy, 31.6mm, 12mm offset
Component Front Tire
Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.00"
Component Wheel Size
27.5-inch, 29-inch
Component Bottom Bracket
VP BC73, 73mm, threaded cartridge
Component Rear Derailleur
Shimano Tourney TY300, long cage, 34T max cog
Component Front Derailleur
Shimano Tourney TY300, 34.9mm clamp, down swing, down pull
Hubs
Front: Formula DC-20, alloy, 6-bolt Rear: Formula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel
Crankset
Shimano Tourney TY301, 42/34/24
Pedals
VP-536 nylon platform
Bottom Bracket
VP BC73, 73mm, threaded cartridge
Chain
KMC Z7, 7 speed
Saddle
Bontrager Arvada, steel rails, 138mm width
Handlebar
Bontrager alloy, 31.8mm, 5mm rise
Front Derailleur
Shimano Tourney TY300, 34.9mm clamp, down swing, down pull
Rear Derailleur
Shimano Tourney TY300, long cage, 34T max cog
Stem
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree
Axles
Front: 5x100mm QR Rear: 135x5mm QR
Brakes
Tektro MD-M280 mechanical disc
Cassette
Shimano TZ500, 14-28, 7 speed
Fork
SR Suntour XCE 28, coil spring, preload, 100mm travel
Frame
Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount
Seat Post
Bontrager alloy, 31.6mm, 12mm offset
Shifters
Shimano Altus EF500, 7 speed
Color
Magenta
Size
XX-Large
Wheel Size
29-inch
Front Tire
Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.00"

What to check when buying used

Inspection

Frame condition

Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.

Inspection

Drivetrain wear

Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.

Inspection

Service history

Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.

Inspection

Suspension service

Confirm fork and rear shock service intervals and check pivot bearings for play.

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