Trek Marlin 6 Gen 3 - 2025

It's right for you if...

You want a trail bike that's dialled for building confidence on the dirt, and versatile enough for commuting to work or school.

The tech you get

A lightweight aluminium frame with modern trail riding geometry and internal routing that keeps cables protected and keeps the bike looking sleek. A 100 mm RockShox Judy front suspension fork that cushions rocks, roots and bumps in the trail, 10-speed fuss-free Shimano CUES shifting and the serious stopping power of hydraulic disc brakes.

The final word

The Marlin 6 is an ideal trail bike for riders who want to progress on the dirt, and want a bike that can keep them rolling off of the trail, too.

Why you'll love it

• The Marlin Gen 3 gives you serious trail capability with bigger tyre clearance, internal dropper post routing, ThruSkew rear axle and longer, slacker geometry that gives you more stability on steeper trails and at higher speeds
• Its RockShox fork gives you 100 mm of suspension for turning rocks and roots on the trail into smooth-sailing
• Mudguard mounts make it easy to accessorise, so your mountain bike can double as a rugged commuter
• Internal routing makes it easy to add a dropper post that lets you lower your saddle on the fly for more confident descending
• 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

SPECS

FRAMESET

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 | RockShox Judy, coil spring, preload, TurnKey lockout, 42 mm offset for 27.5" wheel, 100 mm QR, 80 mm travel

- Size: XS , S | RockShox Judy, coil spring, preload, TurnKey lockout, 42 mm offset for 27.5" wheel, 100 mm QR, 100 mm travel

- Size: M , ML , L , XL , XXL | RockShox Judy, coil spring, preload, TurnKey lockout, 46 mm offset for 29" wheel, 100 mm QR, 100 mm travel

Max compatible fork travel: 120mm, XXS: 80mm

WHEELS

Hub front: Formula DC-20, alloy, 6-bolt, 100 mm ThruSkew

Hub rear: Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR

Skewer rear: 173x5 mm QR

Rim: Bontrager Kovee, double-wall, Tubeless-Ready, 28-hole, 23 mm width, Presta valve

Tyre:

- Size: XXS | Bontrager XT3 Elite, Tubeless Ready, Inner Strength casing, wire bead, 60 tpi, 26x2.35"

- Size: XS , S | Maxxis Ardent Race, tubeless ready, EXO casing, folding bead, 60 tpi, 27.5x2.35"

- Size: XS , S | Maxxis IKON, tubeless ready, EXO casing, folding bead, 60 tpi, 27.5x2.35''

- Size: M , ML , L , XL , XXL | Maxxis Ardent Race, tubeless ready, EXO casing, folding bead, 60 tpi, 29x2.35"

- Size: M , ML , L , XL , XXL | Maxxis IKON, tubeless ready, EXO casing, folding bead, 60 tpi, 29x2.35''

Max tyre size: Frame: 29x2.40" (XXS: 26x2.40", XS & S: 27.5x2.40"), Fork: See manufacturer

DRIVETRAIN

Shifter: Shimano U6000, 10-speed

Rear derailleur: Shimano CUES U6000 GS

Crank:

- Size: XXS , XS | FSA Alpha Drive, 30T, 160 mm length

- Size: S , M , ML | FSA Alpha Drive, 30T, 170 mm length

- Size: L , XL , XXL | FSA Alpha Drive, 30T, 175 mm length

Bottom bracket: FSA, 73 mm, threaded cartridge, 122.5 mm spindle

Cassette: Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed

Chain: Shimano LG500

Pedal: VP-536 nylon platform

Max. chainring size: 1x: 34T, 2x: 36/22

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: Bontrager XR Trail 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 rotor: Tektro, 6-bolt, 160mm

Brake Set:

- Size: XXS , XS , S | Tektro HD-M276 hydraulic disc, short reach

- Size: M , ML , L , XL , XXL | Tektro HD-M275 hydraulic disc

Rotor size: Max brake rotor sizes - Frame: 180mm (XXS: 160mm), Fork: see fork manufacturer

WEIGHT

Weight: M - 14.50 kg / 31.97 lbs (with tubes)

Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).

The manufacturer reserves 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. The prices shown are the manufacturer's suggested retail prices.