Trek Marlin 7 Gen 3 Keswick
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It's right for you if...
You want a go-anywhere trail bike that's got upgrades where it matters most, but won't break the bank. You want to build skills on the trail, and need a bike with confidence-inspiring geometry and upgraded components that can keep up with your progress.
The tech you get
A lightweight aluminum frame with modern trail riding geometry and internal routing that keeps cables protected and the bike looking sleek. An upgraded RockShox suspension fork smooths out rowdy trails, 12-speed SRAM SX Eagle shifting, and the serious stopping power of hydraulic disc brakes.
The final word
Marlin 7 is the go-to trail bike for those wanting to build skills on the singletrack and get the right bang for their buck with upgraded suspension and confidence-inspiring geometry.
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 Why you'll love it
- Marlin Gen 3 gives you serious trail capability, with big tire clearance and slack, confidence-boosting geometry that keeps you stable from singletrack to city
- Its upgraded RockShox fork gives you 100mm of suspension for turning rocks and roots in the trail into smooth-sailing
- Fender mounts make it easy to accessorize, 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
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*Please note - spec applies to all sizes unless listed separately
*Frame | Size:Â XXS , XS Alpha Silver Aluminum, curved top tube, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew |
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Size:Â S , M , ML , L , XL , XXL Alpha Silver Aluminum, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew |
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*Fork | Size:Â XXS RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 100Â mm QR, 80Â mm travel |
Size:Â XS , S RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel |
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Size:Â XS , S , M , ML , L , XL , XXL RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 100Â mm QR, 100Â mm travel |
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Size:Â M , ML , L , XL , XXL RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 46mm offset for 29'' wheel, 100mm QR, 100mm travel |
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Max compatible fork travel | 120mm, XXS: 80mm |
Hub front | Formula DC-20 LW, alloy, 6-bolt, 5x100mm QR |
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Hub rear | Formula DC-22LW, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR |
Skewer rear | 173x5mm QR |
Rim | Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23mm width, Presta valve |
*Tire | Size:Â XXS Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 26x2.40" |
Size:Â XS , S Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 27.5x2.40" |
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Size:Â M , ML , L , XL , XXL Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 29x2.40" |
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Max tire size | Frame: 29x2.40" (XXS: 26x2.40", XS & S: 27.5x2.40"), Fork: See manufacturer |
Shifter | SRAM SX Eagle, 12 speed |
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Rear derailleur | SRAM SX Eagle, 12 speed |
*Crank | Size:Â XXS SRAM SX Eagle, 30T steel ring (49mm chainline), 155Â mm length |
Size:Â XS , S , M SRAM SX Eagle, 30T steel ring (49mm chainline), 170Â mm length |
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Size:Â ML , L , XL , XXL SRAM SX Eagle, 30T steel ring (49mm chainline), 175Â mm length |
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Bottom bracket | Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle |
Cassette | SRAM PG-1210 Eagle, 11-50, 12 speed |
Chain | SRAM SX Eagle, 12 speed |
Pedal | VP-536 nylon platform |
Max chainring size | 1x: See FAQ, 2x: 36T, 3x: 42T |
Saddle | Bontrager Verse Short, stainless steel rails |
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*Seatpost | Size:Â XXS , XS , S TranzX JD-YSP18, 100mm travel, internal routing, 31.6mm, 361mm length |
Size:Â M TranzX JD-YSP18, 130mm travel, internal routing, 31.6mm, 425mm length |
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Size:Â ML , L , XL , XXL TranzX JD-YSP18, 150mm travel, internal routing, 31.6mm, 470mm length |
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*Handlebar | Size:Â XXS , XS Bontrager alloy, 31.8mm, 5mm rise, 690mm width |
Size:Â S Bontrager alloy, 31.8mm, 15mm rise, 720mm width |
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Size:Â M , ML , L , XL , XXL Bontrager alloy, 31.8mm, 15mm rise, 750mm width |
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Grips | Bontrager XR Trail Comp, nylon lock-on |
*Stem | Size:Â XXS , XS , S Bontrager Comp, 31.8mm, 7 degree, 35mm length |
Size:Â M , ML , L Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length |
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Size:Â XL Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length |
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Size:Â XXL Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 70mm length |
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Headset | Semi-integrated, 1-1/8" |
Brake | Shimano MT200 hydraulic disc |
*Brake rotor | Size:Â XXS , XS , S , M , ML , L , XL , XXL Shimano RT26, 6-bolt, 160mm |
Size:Â M , ML , L , XL , XXL Shimano RT26, 6-bolt, 180mm |
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Brake Set | Shimano MT200 hydraulic disc |
Rotor size | Max brake rotor sizes - Frame: 180mm (XXS: 160mm), Fork: see fork manufacturer |
Weight | M - 15.03 kg / 33.14 lbs (with TLR sealant, no tubes) |
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Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
We reserve 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, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
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