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Today’s Deals2026 Trek
Marlin 5 Gen 3
A 27.5″ / 29″ aluminum frame hardtail crosscountry bike with upper mid-range components.
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Manufacturer Price
$849| Weight | 33.3 lbs |
|---|---|
| Frame | Aluminum |
| Suspension | Hardtail, 80mm |
| Fork | Suntour XCT |
| Wheels | 27.5″ / 29″ Aluminum |
| Drivetrain | 1 × 9 |
| Groupset | CUES |
| Brakes | Shimano Hydraulic Disc |
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full Marlin model range
View Comparison4'9" – 5'2"
5'0" – 5'6"
5'4" – 5'10"
5'8" – 5'11"
5'9" – 6'3"
6'1" – 6'6"
6'4" – 6'8"
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Jul 2025
A 27.5″ / 29″ aluminum frame hardtail crosscountry bike with mid-range components.
Modern XC geometry
Clean aesthetics and internal cable routing
Shimano CUES drivetrain democratizes great shifting
Straight headtube, QR front hub, and “Thru-Skew” axle in the rear limit future upgrades
Wheels are not tubeless compatible
Heavy, poor performing 80 mm travel fork
Apr 2024 · James Huang
Trek’s entry-level aluminum hardtail mountain bike.
Fantastic frame geometry
Excellent shifting
Good tires
Looks great
Generous tire clearance
Easy-to-live-with semi-internal routing
Sort of a rear thru-axle.
Mega-heavy fork with minimal adjustability
Tubeless costs extra
Limited upgrade potential.
May 2023 · Andrew McLemore
Riders can expect updated geometry, a new frame, increased tire clearance and a rear axle system that "enhances stability," Trek said.
Feb 2023 · Oscar Huckle
Can the Marlin compete with the bigger players?
Lots of frame sizes
Excellent tyre choice
Dropper seatpost
Upgrade potential
Roomier seated position would be preferred
Quick-release rather than thru-axle
Rattly internal cable routing
| Frame | Frameset Marlin, Alpha Silver Aluminum, curved top tube, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew - XS : Alpha Silver Aluminum, curved top tube, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew; S , M , ML , L , XL , XXL : Alpha Silver Aluminum, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew BB Standard: BSA, 73mm, Threaded Tire Clearance: 2.4" Colors: Mulsanne Blue; Fury Red; Miami Green / Dark Aquatic Fade |
|---|---|
| Fork | SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 42 mm offset for 27.5'' wheel, 100 mm QR, 80 mm travel - XS : SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 42 mm offset for 27.5'' wheel, 100 mm QR, 80 mm travel; S : SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 42 mm offset for 27.5'' wheel, 100 mm QR, 100 mm travel; M , ML , L , XL , XXL : SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 42 mm offset for 29'' wheel, 100 mm QR, 100 mm travel Travel: 80mm Spring Type: Coil |
| Bottom Bracket | Shimano, 73mm, threaded cartridge, 122.5mm spindle |
| Headset | Semi-integrated, 1-1/8'' |
| Stem | Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 35mm length - XS , S : Bontrager Comp, 31.8mm, 7 degree, 35mm length; M , ML , L : Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length; XL : Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length; XXL : Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 70mm length |
| Handlebar | Bontrager Approved Lowriser, 31.8x690mm, 5mm Rise, 9D Bend/4D Upsweep, Black - XS : Bontrager alloy, 31.8mm, 5mm rise, 690mm width; S : Bontrager alloy, 31.8mm, 15mm rise, 720mm width; M , ML , L , XL , XXL : Bontrager alloy, 31.8mm, 15mm rise, 750mm width |
| Saddle | Bontrager Verse Short, stainless steel rails |
| Seatpost | Bontrager Approved Seatpost, 31.6x330mm, 12mm Offset, Black - XS , S , M : Bontrager alloy, 31.6mm, 12mm offset, 330mm length; ML , L , XL , XXL : Bontrager alloy, 31.6mm, 12mm offset, 400mm length Type: Rigid |
| Pedals | Nylon platform |
| Grips | Trek Line Comp, nylon lock-on |
| Rear Derailleur | Shimano CUES U4000 |
|---|---|
| Crank | Shimano CUES U4001, 32T, 52mm chainline, 170mm length (Visit si.shimano.com for compatibility, manuals and exploded views) - XS , S , M , ML : Shimano CUES U4001, 32T, 52mm chainline, 170mm length; L , XL , XXL : Shimano CUES U4001, 32T, 52mm chainline, 175mm length |
| Shifters | Shimano U4000, 9 speed |
| Cassette | Shimano LINKGLIDE LG300, 11-46, 9 speed |
| Chain | Shimano LG500, 9/10/11 speed |
| Brakes | Shimano MT200 hydraulic disc Type: Shimano Hydraulic Disc |
| Rims | Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve |
|---|---|
| Spokes | 14g stainless steel, black |
| Front Hub | Formula DC-20, alloy, 6-bolt, 100x5mm |
| Rear Hub | Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5mm |
| Tires | Bontrager Montrose Comp, wire bead, 30 tpi, 27.5x2.40'' - XS , S : Bontrager Montrose Comp, wire bead, 30 tpi, 27.5x2.4''; M , ML , L , XL , XXL : Bontrager Montrose Comp, wire bead, 30 tpi, 29x2.4'' |
| Disc Rotors | Shimano Tourney Rotor. Item Number: SM-RT26-S, 160mm, 6-Bolt, For Resin Pad only. (Visit si.shimano.com for compatibility, manuals and exploded views) - XS , S , M , ML , L , XL , XXL : Shimano RT26, 6-bolt, 160mm; M , ML , L , XL , XXL : Shimano RT26, 6-bolt, 180mm |
First added July 5
Last updated June 7