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Today’s Deals2026 Trek
Marlin Gen 3 Frameset
A 26″ / 27.5″ / 29″ aluminum frame crosscountry frameset.
4'5" – 4'10"
4'8" – 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 - XXS , 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 Tire Clearance: 2.4" Color: Matte Dnister Black |
|---|---|
| Headset | Semi-integrated, 1-1/8'' |
| Tires | Frame: 29x2.40" (XXS: 26x2.40", XS & S: 27.5x2.40"), Fork: See manufacturer |
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First added July 1
Last updated May 30