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2026 Trek Marlin 4 Gen 3 Mountain Bike in mint green color, showcasing its hardtail design and sturdy frame for trail riding.
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2026 Trek Marlin 4 Gen 3 Mountain Bike is a versatile hardtail built for riders who want a capable trail bike that can also handle everyday commuting and recreational rides. Designed with Trek’s proven mountain bike geometry, this bike delivers stability, control, and comfort whether you’re exploring dirt trails, riding local paths, or commuting through town.

At the heart of the 2026 Trek Marlin 4 Gen 3 Mountain Bike is a durable and lightweight frame engineered for confident off-road performance. The modern trail-inspired design provides stable handling and comfortable riding posture, making it ideal for new mountain bikers and riders looking for a reliable everyday bike. Internal cable routing helps keep the bike looking clean while protecting cables from dirt and debris.

The front suspension fork helps absorb bumps, roots, and uneven terrain so riders can maintain control on rough surfaces. This added comfort makes the 2026 Trek Marlin 4 Gen 3 Mountain Bike perfect for riders who want a smoother experience on gravel paths, park trails, and light singletrack.

Equipped with Shimano ESSA 8-speed shifting, the drivetrain offers smooth and dependable gear changes. The wide gear range allows riders to tackle hills with confidence while maintaining speed on flat terrain. Whether climbing or cruising, this gearing system keeps the ride simple and efficient.

Practical versatility makes the 2026 Trek Marlin 4 Gen 3 Mountain Bike stand out. Built-in mounts allow riders to easily install a rear rack or kickstand, making this bike a great option for commuting, weekend adventures, or everyday transportation.

With the durability of a true mountain bike and the comfort needed for daily riding, the 2026 Trek Marlin 4 Gen 3 Mountain Bike is a reliable choice for riders ready to explore both city streets and off-road trails.

Features:

  • Lightweight and durable trail-ready mountain bike frame
  • Front suspension fork for improved comfort and control
  • Shimano ESSA 8-speed drivetrain for smooth shifting
  • Stable geometry ideal for beginner trail riders
  • Internal cable routing for clean design and protection
  • Mounts for rack and kickstand for commuting versatility
  • Reliable braking system for confident stopping power
  • Perfect for trails, commuting, and recreational riding

*Frame
Size: XXS , XS
Alpha Silver Aluminium, curved top tube, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew
Size: S , M , ML , L , XL , XXL
Alpha Silver Aluminium, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew
*Fork
Size: XXS
SR Suntour XCM 30, coil spring, lockout, preload, 100 mm QR, 100 mm travel, 26" wheel
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

Wheels
Hub front
Formula DC-20, alloy, 6-bolt, 100x5 mm
Skewer front
116x5mm QR
Hub rear
Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm
Skewer rear
173x5 mm QR
Rim
Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
*Tyre
Size: XXS
Bontrager Montrose Comp, wire bead, 30 tpi, 26x2.35''
Size: XS , S
Bontrager Montrose Comp, wire bead, 30 tpi, 27.5x2.40"
Size: M , ML , L , XL , XXL
Bontrager Montrose Comp, wire bead, 30 tpi, 29x2.40"

Drivetrain
Shifter
Shimano M315, 8-speed
Rear derailleur
Shimano ESSA U2000
*Crank
Size: XXS , XS
ProWheel alloy, 30T narrow-wide steel ring, 160 mm length
Size: S , M , ML
ProWheel alloy, 30T narrow-wide steel ring, 170 mm length
Size: L , XL , XXL
ProWheel alloy, 30T narrow-wide steel ring, 175 mm length
Bottom bracket
Threaded cartridge
Cassette
Shimano HG300, 11-45, 8-speed
Chain
KMC Z8.3, 8-speed
Pedal
Nylon platform

Components
Saddle
Bontrager Verse Short, stainless steel rails
*Seatpost
Size: XXS
Bontrager alloy, 31.6 mm, 12 mm offset, 300 mm length
Size: XS , S , M
Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
Size: ML , L , XL , XXL
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
*Handlebar
Size: XXS , XS
Bontrager alloy, 31.8 mm, 5 mm rise, 690 mm width
Size: S
Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width
Size: M , ML , L , XL , XXL
Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
Grips
Trek Line Comp, nylon lock-on
*Stem
Size: XXS , XS , S
Bontrager Comp, 31.8 mm, 7-degree, 35 mm length
Size: M , ML , L
Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length
Size: XL
Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 60 mm length
Size: XXL
Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 70 mm length
Head set
Semi-integrated, 1-1/8''
*Brake
Size: XXS , XS , S
Tektro HD-M276 hydraulic disc
Size: XXS , XS , S , M , ML , L , XL , XXL
Power BH-M286TF hydraulic disc, 160 mm rotor
Size: M , ML , L , XL , XXL
Tektro HD-M275 hydraulic disc
Size: M , ML , L , XL , XXL
Power BH-M286TF hydraulic disc, 180 mm rotor
*Brake rotor
Size: XXS , XS , S , M , ML , L , XL , XXL
Tektro, 6-bolt, 160mm
Size: M , ML , L , XL , XXL
Tektro, 6-bolt, 180mm

AZUR Performance logo with blue and gray design
Logo of Ampd Bros with a stylized 'A' and 'B' design.
Trek logo on a white background
Solid black square
Solid black square
Electra logo in black script on a white background
Specialized logo in black on a white background
Giant logo in blue on a black background
Malvern Star logo in black text on a white background
Purple logo with the letter 'L' on a white background

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