Trek Marlin 8 Gen 3

By Trek
$1,299.99
SKU: 5277581 // Barcode: 601842864449
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Marlin 8 is a confidence-boosting trail bike with updated geometry that gives you more control on singletrack without skipping on features for everyday use, like mounts for racks and a kick stand. Its built for years of progress thanks to 12-speed SRAM shifting, and an upgraded RockShox air spring suspension fork.
  • You get real-deal modern mountain bike geometry that keeps handling confident when youre on singletrack, but its versatile enough for use on roads and bike paths, too
  • You get a premium RockShox fork with an air spring thats lighter and more adjustable than a coil
  • You get the simplicity and range of 1x12 drivetrain for putting down power on the trail
  • The included dropper post lets you get your saddle out of the way when you roll into technical sections and steeper descents.
  • Marlin models in sizes XXS and XS have a curved top tube and lower standover height that makes it easier for smaller riders to mount and dismount

Expanded size range

With 8 different sizes, Marlin has a bike made to fit every rider. Each frame is equipped with smart wheel sizing, with XXS frames rolling on 26" wheels, and wheel sizes increasing proportionally along with frame sizes, so every rider gets the fit they need.

Trail-ready, Upgrade-ready

The secret to Marlins popularity is a real trail-savvy mountain bike frame thats upgrade compatible, so it can grow with you as you take on bigger trails and tougher features.

Roll stronger with Thru Skew

Goodbye open dropouts. The Thru Skewer is a better, stronger, more precisely aligned rear wheel retention system that keeps your wheel more secure than quick-release skewers while still using the standard 135mm rear hub spacing.

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 derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew
Fork RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 42mm offset for 27.5 wheel, 100mm QR, 80mm travel
Wheel Front /
Tire Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 26x2.40
Hub Front Formula DC-20 LW, alloy, 6-bolt, 5x100mm QR
Hub Rear Formula DC-22LW, 6-bolt, Shimano 8/9/10 freehub, 135x5mm QR
Rim Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23mm width, Presta valve
Skewer Rear Bontrager Switch thru axle
Shifter SRAM SX Eagle, 12 speed
Rear Derailleur SRAM SX Eagle
Crank SRAM SX Eagle, 30T steel ring, 49mm chainline, 155mm length
Bottom Bracket Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle
Cassette SRAM PG-1210 Eagle, 11-50, 12 speed
Chain SRAM SX Eagle, 12 speed
Brake Rotor Shimano RT26, 6-bolt,160mm
Pedal VP-536 nylon platform
Saddle Bontrager Arvada, steel rails, 138mm width
Seatpost TranzX JD-YSP18, 100mm travel, internal routing, 31.6mm, 361mm length
Seat Collar Bolt-on, 36.4mm
Handlebar Bontrager alloy, 31.8mm, 5mm rise, 690mm width
Stem Bontrager Comp, 31.8mm, 7 degree, 35mm length
Headset Semi-integrated, 1-1/8
Grips Bontrager XR Trail Comp, nylon lock-on

Geometry Chart

XXS (26" WHEEL)XS (27.5" WHEEL)S (27.5" WHEEL)M (29" WHEEL)ML (29" WHEEL)L (29" WHEEL)XL (29" WHEEL)
B B Drop 3.8
B B Height 30.2
Chainstay Length 43.3
Eff Seat Tube Angle 74.0°
Eff Top Tube 52.1
Frame Reach 36.5
Frame Size Letter XXS
Frame Size Number 13.5"
Frame Stack 54.4
Head Angle 66.5°
Head Tube Length 9
Offset 4
Seat Tube 32
Seat Tube Angle 74.0°
Standover 65
Trail 10.4
Wheelbase 106
Wheel Size 26"
B B Drop 4.5
B B Height 31.3
Chainstay Length 43.3
Eff Seat Tube Angle 74.0°
Eff Top Tube 55.1
Frame Reach 39
Frame Size Letter XS
Frame Size Number 14.5"
Frame Stack 56.3
Head Angle 66.5°
Head Tube Length 9
Offset 4.2
Seat Tube 34
Seat Tube Angle 73.8°
Standover 65.8
Trail 11
Wheelbase 109.2
Wheel Size 27.5"
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"
B B Drop 6
B B Height 30.8
Chainstay Length 43.8
Eff Seat Tube Angle 74.0°
Eff Top Tube 61.5
Frame Reach 44
Frame Size Letter M
Frame Size Number 17.5"
Frame Stack 60.9
Head Angle 66.5°
Head Tube Length 10.5
Offset 4.6
Seat Tube 42
Seat Tube Angle 73.4°
Standover 74.7
Trail 11
Wheelbase 116.3
Wheel Size 29"
B B Drop 6
B B Height 30.8
Chainstay Length 43.8
Eff Seat Tube Angle 74.0°
Eff Top Tube 63.1
Frame Reach 45.5
Frame Size Letter ML
Frame Size Number 18.5"
Frame Stack 61.4
Head Angle 66.5°
Head Tube Length 11
Offset 4.6
Seat Tube 43.5
Seat Tube Angle 73.4°
Standover 75.9
Trail 11
Wheelbase 118
Wheel Size 29"
B B Drop 6
B B Height 30.8
Chainstay Length 43.8
Eff Seat Tube Angle 74.0°
Eff Top Tube 64.7
Frame Reach 47
Frame Size Letter L
Frame Size Number 19.5"
Frame Stack 61.8
Head Angle 66.5°
Head Tube Length 11.5
Offset 4.6
Seat Tube 45
Seat Tube Angle 73.4°
Standover 77.1
Trail 11
Wheelbase 119.7
Wheel Size 29"
B B Drop 6
B B Height 30.8
Chainstay Length 43.8
Eff Seat Tube Angle 74.0°
Eff Top Tube 67.8
Frame Reach 49.5
Frame Size Letter XL
Frame Size Number 21.5"
Frame Stack 63.7
Head Angle 66.5°
Head Tube Length 13.5
Offset 4.6
Seat Tube 50
Seat Tube Angle 73.4°
Standover 79.1
Trail 11
Wheelbase 123
Wheel Size 29"