2023 Trek
Marlin 8 Gen 3
A 26″ / 27.5″ / 29″ aluminum frame hardtail crosscountry bike with upper mid-range components.
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Mentioned in Which Trek Marlin is Best for You?
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Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full Marlin model range
View Comparison4'5" – 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"
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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.
Sep 2023
Not only is the Trek Marlin one of the most searched bikes on our website, it's also Trek's best selling mountain bike! And for good ...
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
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 | Size: XXS, XS, Alpha Silver Aluminum, curved top tube, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew; Size: S, M, ML, L, XL, Alpha Silver Aluminum, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew BB Standard: BSA, 73mm, Threaded Tire Clearance: 2.4" |
|---|---|
| Fork | Size: XXS, RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel; Size: XS, S, RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel; Size: M, ML, L, XL, RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 46mm offset for 29'' wheel, 100mm QR, 100mm travel Travel: 80mm Spring Type: Air |
| Bottom Bracket | Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle |
| Headset | Semi-integrated, 1-1/8'' |
| Stem | Size: XXS, XS, S, Bontrager Comp, 31.8mm, 7 degree, 35mm length; Size: M, ML, L, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: XL, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length |
| Handlebar | Size: XXS, XS, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: S, Bontrager alloy, 31.8mm, 15mm rise, 720mm width; Size: M, ML, L, XL, Bontrager alloy, 31.8mm, 15mm rise, 750mm width |
| Saddle | Bontrager Arvada, steel rails, 138mm width |
| Seatpost | Size: XXS, XS, S, TranzX JD-YSP18, 100mm travel, internal routing, 31.6mm, 361mm length; Size: M, TranzX JD-YSP18, 130mm travel, internal routing, 31.6mm, 425mm length; Size: ML, L, XL, TranzX JD-YSP18, 150mm travel, internal routing, 31.6mm, 470mm length Type: Dropper |
| Pedals | VP-536 nylon platform |
| Grips | Bontrager XR Trail Comp, nylon lock-on |
| Rear Derailleur | SRAM SX Eagle |
|---|---|
| Crank | Size: XXS, SRAM SX Eagle, 30T steel ring, 49mm chainline, 155mm length; Size: XS, S, M, SRAM SX Eagle, 30T steel ring, 49mm chainline, 170mm length; Size: ML, L, XL, SRAM SX Eagle, 30T steel ring, 49mm chainline, 175mm length |
| Shifters | SRAM SX Eagle, 12 speed |
| Cassette | SRAM PG-1210 Eagle, 11-50, 12 speed |
| Chain | SRAM SX Eagle, 12 speed |
| Brakes | Shimano MT200 hydraulic disc Type: Hydraulic Disc |
| Rims | Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23mm width, Presta valve |
|---|---|
| Front Hub | Formula DC-20 LW, alloy, 6-bolt, 5x100mm QR |
| Rear Hub | Formula DC-22LW, 6-bolt, Shimano 8/9/10 freehub, 135x5mm QR |
| Tires | Size: XXS, Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 26x2.40''; Size: XS, S, Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 27.5x2.40''; Size: M, ML, L, XL, Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 29x2.40'' |
| Disc Rotors | Size: XXS, XS, S, M, ML, L, XL, Shimano RT26, 6-bolt,160mm; Size: M, ML, L, XL, Shimano RT26, 6-bolt,180mm |
Last updated April 18