Trek marlin 4 gen 2

$529.93 Sale Save
Color MATTE TREK BLACK

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Marlin 4 is the perfect gateway to trail riding. Its 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 and fenders make this a great bike for new trail riders and campus commuters alike.
  • Its a real mountain bike thats 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, its backed by Treks lifetime warranty

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.

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.


Frame Alpha Silver Aluminum, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR
Fork SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5 wheel, 100mm QR, 80mm travel
Wheel Front /
Tire Bontrager XR2 Comp, wire bead, 30 tpi, 27.5x2.20
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 Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve, Black
Skewer Rear 152x5mm QR
Shifter Shimano EF500, 7 speed // Shimano EF500, 7 speed
Front Derailleur Shimano Tourney TY300, 34.9mm clamp, down swing, down pull
Rear Derailleur Shimano Tourney TY300
Crank Shimano Tourney TY301, 42/34/24, 170mm length
Bottom Bracket VP BC73, 73mm, threaded cartridge // Sealed cartridge, 73mm
Cassette Shimano TZ500, 14-28, 7 speed
Chain KMC Z7, 7 speed
Brake Tektro MD-M280 mechanical disc, 160mm rotor // Tektro MD-M281 mechanical disc, 160mm rotor
Pedal VP-536 nylon platform // VP-536 nylon platform
Saddle Bontrager Arvada, steel rails, 138mm width
Seatpost Bontrager alloy, 31.6mm, 12mm offset, 330mm length
Handlebar Bontrager alloy, 31.8mm, 5mm rise, 690mm width
Stem Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length
Headset Semi-integrated, 1-1/8
Grips Bontrager XR Endurance Comp, lock-on // Bontrager XR Endurance Comp, lock-on

Geometry Chart

B B Drop 5.8
B B Height 29.2
Chainstay Length 43.8
Eff Seat Tube Angle 73.5°
Eff Top Tube 54.4
Frame Reach 37.6
Frame Size Letter XS
Frame Size Number 13.5"
Frame Stack 56.5
Head Angle 69.3°
Head Tube Length 9
Offset 4.2
Seat Tube 34.3
Seat Tube Angle 73.5°
Standover 65.8
Trail 8.8
Wheelbase 104.9
Wheel Size 27.5"
B B Drop 4.8
B B Height 30.2
Chainstay Length 43.8
Eff Seat Tube Angle 73.5°
Eff Top Tube 55.5
Frame Reach 38.5
Frame Size Letter S
Frame Size Number 15.5"
Frame Stack 57.4
Head Angle 69.3°
Head Tube Length 9
Offset 4.2
Seat Tube 36.8
Seat Tube Angle 73.5°
Standover 68.6
Trail 8.8
Wheelbase 106.6
Wheel Size 27.5"
B B Drop 5.8
B B Height 31
Chainstay Length 43.8
Eff Seat Tube Angle 73.0°
Eff Top Tube 60.2
Frame Reach 41.8
Frame Size Letter M
Frame Size Number 17.5"
Frame Stack 60.2
Head Angle 69.5°
Head Tube Length 9
Offset 4.2
Seat Tube 41.9
Seat Tube Angle 71.9°
Standover 74.8
Trail 9.3
Wheelbase 110
Wheel Size 29"
B B Drop 5.8
B B Height 31
Chainstay Length 43.8
Eff Seat Tube Angle 73.0°
Eff Top Tube 61.8
Frame Reach 43.4
Frame Size Letter ML
Frame Size Number 18.5"
Frame Stack 60.2
Head Angle 69.5°
Head Tube Length 9
Offset 4.2
Seat Tube 44.4
Seat Tube Angle 71.9°
Standover 75.8
Trail 9.3
Wheelbase 111.6
Wheel Size 29"
B B Drop 5.8
B B Height 31
Chainstay Length 43.8
Eff Seat Tube Angle 73.0°
Eff Top Tube 63.8
Frame Reach 45.1
Frame Size Letter L
Frame Size Number 19.5"
Frame Stack 61.1
Head Angle 69.5°
Head Tube Length 10
Offset 4.2
Seat Tube 47
Seat Tube Angle 71.9°
Standover 75.7
Trail 9.3
Wheelbase 113.7
Wheel Size 29"
B B Drop 5.8
B B Height 31
Chainstay Length 43.8
Eff Seat Tube Angle 73.0°
Eff Top Tube 65.9
Frame Reach 46.6
Frame Size Letter XL
Frame Size Number 21.5"
Frame Stack 63
Head Angle 69.5°
Head Tube Length 12
Offset 4.2
Seat Tube 52.1
Seat Tube Angle 71.9°
Standover 76.9
Trail 9.3
Wheelbase 115.9
Wheel Size 29"
B B Drop 5.8
B B Height 31.1
Chainstay Length 43.8
Eff Seat Tube Angle 73.0°
Eff Top Tube 67.3
Frame Reach 48
Frame Size Letter XXL
Frame Size Number 23.0"
Frame Stack 63
Head Angle 69.5°
Head Tube Length 12
Offset 4.2
Seat Tube 55.9
Seat Tube Angle 71.9°
Standover 80.4
Trail 9.3
Wheelbase 117.3
Wheel Size 29"