Trek Marlin 7 Gen 3
Description
- You get real-deal modern mountain bike geometry that keeps handling confident when you're on singletrack, but it's versatile enough for use on roads and bike paths, too
- You get a RockShox fork with 100mm of suspension that turns rocks and roots in the trail into smooth-sailing, and upgraded 12-speed SRAM Eagle shifting
- 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 you 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
Tech Specs
| Frame | Alpha Silver Aluminum, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew |
| Fork | RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 46mm offset for 29'' wheel, 100mm QR, 100mm travel |
| Tire | Maxxis Rekon, tubeless ready, EXO casing, folding bead, 60tpi, 29x2.40'' |
| Hub Front | Formula DC-20 LW, alloy, 6-bolt, 100x5mm |
| Hub Rear | Formula DC-22LW, 6-bolt, Shimano 8/9/10 freehub, 135x5mm |
| Rim | Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23mm width, Presta valve // Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, Presta valve |
| Rim Strip | Bontrager TLR |
| Skewer Front | 116x5mm QR |
| Skewer Rear | 173x5mm QR |
| Shifter | SRAM SX Eagle, 12 speed |
| Rear Derailleur | SRAM NX Eagle, 12 speed |
| Crank | SRAM SX Eagle, 30T steel ring, 49mm chainline, 175mm length |
| Bottom Bracket | Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle |
| Cassette | SRAM PG-1210 Eagle, 11-50, 12 speed |
| Chain | SRAM SX Eagle, 12 speed |
| Brake | Shimano MT200 hydraulic disc |
| Brake Rotor | Shimano RT26, 6-bolt, 180mm // Shimano RT26, 6-bolt, 160mm |
| Pedal | VP-536 nylon platform |
| Saddle | Bontrager Verse Short, stainless steel rails |
| Seatpost | TranzX JD-YSI34, 150mm travel, internal routing, 31.6mm, 456mm length |
| Seat Collar | Bolt-on, 36.4mm |
| Handlebar | Bontrager alloy, 31.8mm, 15mm rise, 750mm width |
| Stem | Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length |
| Headset | Semi-integrated, 1-1/8'' |
| Grips | Trek Line Comp, nylon lock-on |
Product Identifiers
| Brand | Trek |
| Type | Mountain Bike |
| SKU | 5337148 |
| UPC | 197216252917 |
| MPN | 5337148 |
Will my bike have a curved top tube?
Smaller frames have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frame sizes have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.
Fit for every rider
Marlin comes in seven frame sizes to suit riders of any height, and Smart Wheel Size ensures you’re on the fastest wheel that fits. The smallest sizes even come with short-reach brake levers and narrower handlebars that give smaller riders better comfort and control.
High tech, high value
Marlin looks and feels great. It’s packed with features usually found only on more expensive bikes, like a stylish frame with internal shift cable and brake hose routing, which can help your cables last longer by protecting them from the elements.
A better way to produce aluminum
Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.
Upgrade your pedals and love your bike more
Pedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.
Geometry
| B B Drop | 6 |
| B B Height | 30.8 |
| Chainstay Length | 43.8 |
| Eff Seat Tube Angle | 74.0° |
| Eff Top Tube | 64.7 |
| Frame Reach | 47 |
| Frame Size Letter | L |
| Frame Size Number | 19.5" |
| Frame Stack | 61.8 |
| Head Angle | 66.5° |
| Head Tube Length | 11.5 |
| Offset | 4.6 |
| Seat Tube | 45 |
| Seat Tube Angle | 73.4° |
| Standover | 77.1 |
| Trail | 11 |
| Wheelbase | 119.7 |
| Wheel Size | 29" |