Trek Marlin 4 Gen 3
$379.00
The Trek Marlin 4 Gen 3 is an aluminum cross-country mountain bike with an Alpha Silver Aluminum frame, SR Suntour suspension fork, Shimano 8-speed drivetrain, Bontrager Connection double-wall rims, Bontrager Montrose Comp tires, Bontrager alloy cockpit parts, and hydraulic disc brakes.
Trek Marlin 4 Gen 3 Overview
The Trek Marlin 4 Gen 3 is an aluminum cross-country mountain bike built with an Alpha Silver Aluminum frame, SR Suntour suspension fork, and Shimano 8-speed drivetrain. The frame uses internal derailleur and dropper post routing, rack and kickstand mount, and 135x5mm ThruSkew spacing.
Fork specification changes by size. Size XXS uses an SR Suntour XCM 30 fork with 100mm travel for a 26-inch wheel. Size XS uses an SR Suntour XCE 28 fork with 80mm travel for a 27.5-inch wheel, while sizes S, M, ML, L, and XL use SR Suntour XCE 28 fork specifications with 100mm travel.
The drivetrain combines a Shimano M315 8-speed shifter, Shimano ESSA U2000 rear derailleur, Shimano HG300 11-45T 8-speed cassette, and KMC Z8.3 8-speed chain. The ProWheel alloy crankset uses a 30T narrow-wide steel ring, with crank length matched by frame size.
The wheel setup uses Formula alloy 6-bolt hubs with Bontrager Connection double-wall rims and Schrader valves. Tire sizing is size specific, with Bontrager Montrose Comp 26×2.35” tires on XXS, 27.5×2.4” tires on XS and S, and 29×2.4” tires on M, ML, L, and XL.
Braking specifications vary by size and include hydraulic disc brake systems from Tektro and Power. Finishing parts include a Bontrager Verse Short saddle with stainless steel rails, Bontrager alloy seatpost, Bontrager alloy handlebar, Trek Line Comp lock-on grips, Bontrager Comp stem, and nylon platform pedals.
Key Features of Trek Marlin 4 Gen 3
- Alpha Silver Aluminum frame includes internal derailleur and dropper post routing, plus rack and kickstand mount.
- SR Suntour suspension forks use coil springs, preload adjustment, and size-specific travel.
- Shimano 8-speed drivetrain pairs a Shimano M315 shifter with a Shimano ESSA U2000 rear derailleur.
- Shimano HG300 11-45T cassette gives the drivetrain a broad 8-speed gear range.
- Bontrager Connection double-wall rims use 32-hole construction and Schrader valves.
- Bontrager Montrose Comp tires use wire beads and 30 tpi construction.
- Bontrager alloy cockpit parts are size specific across the handlebar, stem, and seatpost.
- Hydraulic disc brake specifications include Tektro and Power systems depending on size.
Ride Use
This bike fits the cross-country mountain bike category, with an Alpha Silver Aluminum frame, SR Suntour suspension fork, Shimano 8-speed drivetrain, and Bontrager Montrose Comp tires. The hydraulic disc brakes, 11-45T cassette, and size-specific wheel setup support XC riding with practical off-road control features.
Why Choose This Bike
Choose this bike for a cross-country mountain bike build centered on an Alpha Silver Aluminum frame, SR Suntour suspension fork, Shimano 8-speed drivetrain, and hydraulic disc brakes. It also includes Formula alloy hubs, Bontrager Connection double-wall rims, Bontrager Montrose Comp tires, Bontrager alloy cockpit parts, and nylon platform pedals. It comes in Matte Dark Web, Purple Flip, and Blue Sage, with a size M weight of 14.90 kg / 32.85 lbs.
Product Specifications
| Feature | Details |
|---|---|
| Brand | Trek |
| Model | Marlin 4 Gen 3 |
| Bike Type | Cross Country Mountain Bike |
| Frame | Alpha Silver Aluminum, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew. Sizes XXS and XS use a curved top tube. |
| Fork | Size XXS: SR Suntour XCM 30, coil spring, preload, hydraulic lockout, 42mm offset for 26'' wheel, 100mm QR, 100mm travel. Size XS: SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel. Size S: SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel. Sizes M, ML, L, XL: SR Suntour XCE 28, coil spring, preload, 46mm offset for 29'' wheel, 100mm QR, 100mm travel. |
| Front Hub | Formula DC-20, alloy, 6-bolt, 100x5mm |
| Front Skewer | 116x5mm QR |
| Rear Hub | Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5mm |
| Rear Skewer | 173x5mm QR |
| Rim | Bontrager Connection, double-wall, 32-hole, 20mm width, Schrader valve |
| Tire | Bontrager Montrose Comp, wire bead, 30 tpi. Size XXS uses 26x2.35''. Sizes XS and S use 27.5x2.4''. Sizes M, ML, L, and XL use 29x2.4''. |
| Shifter | Shimano M315, 8 speed |
| Rear Derailleur | Shimano ESSA U2000 |
| Crankset | ProWheel alloy, 30T narrow-wide steel ring. 160mm length on XXS and XS; 170mm length on S, M, ML; 175mm length on L and XL. |
| Bottom Bracket | Threaded cartridge |
| Cassette | Shimano HG300, 11-45, 8 speed |
| Chain | KMC Z8.3, 8 speed |
| Pedal | Nylon platform |
| Saddle | Bontrager Verse Short, stainless steel rails |
| Seatpost | Bontrager alloy, 31.6mm, 12mm offset. 300mm length on XXS; 330mm length on XS, S, M; 400mm length on ML, L, XL. |
| Handlebar | Bontrager alloy, 31.8mm. Sizes XXS and XS: 5mm rise, 690mm width. Size S: 15mm rise, 720mm width. Sizes M, ML, L, XL: 15mm rise, 750mm width. |
| Grips | Trek Line Comp, nylon lock-on |
| Stem | Bontrager Comp, 31.8mm, 7 degree. 35mm length on XXS, XS, S; 50mm length on M, ML, L; 60mm length on XL. |
| Headset | Semi-integrated, 1-1/8'' |
| Brake | Sizes XXS, XS, S: Tektro HD-M276 hydraulic disc. Sizes XXS, XS, S, M, ML, L, XL: Power BH-M286TF hydraulic disc with 160mm rotor. Sizes M, ML, L, XL: Power BH-M286TF hydraulic disc with 180mm rotor. Sizes M, ML, L, XL: Tektro HD-M275 hydraulic disc. |
| Brake Rotor | Tektro, 6-bolt, 160mm on XXS, XS, S, M, ML, L, XL; Tektro, 6-bolt, 180mm on M, ML, L, XL. |
| Weight | M - 14.90 kg / 32.85 lbs |
| Weight Limit | Maximum total weight limit: 300 pounds / 136 kg, combined weight of bicycle, rider, and cargo |
| Color | Matte Dark Web, Purple Flip, Blue Sage |
| Manufacturer Warranty | Trek frames and full-suspension swing arms are covered for the lifetime of the original owner. Other parts are covered under Trek’s limited warranty. |
FAQ's Trek Marlin 4 Gen 3
What frame does the Trek Marlin 4 Gen 3 use?
This bike uses an Alpha Silver Aluminum frame with internal derailleur and dropper post routing, rack and kickstand mount, and 135x5mm ThruSkew. Sizes XXS and XS use a curved top tube, while sizes S through XL use the standard Alpha Silver Aluminum frame layout.
What drivetrain is on the Trek Marlin 4 Gen 3?
The bike uses an 8-speed drivetrain with a Shimano M315 shifter and Shimano ESSA U2000 rear derailleur. It also includes a Shimano HG300 11-45T 8-speed cassette, KMC Z8.3 8-speed chain, and ProWheel alloy crankset with a 30T narrow-wide steel ring.
What wheels and tires come on the Trek Marlin 4 Gen 3?
The bike uses Formula alloy 6-bolt hubs with Bontrager Connection double-wall rims. Size XXS uses Bontrager Montrose Comp 26x2.35'' tires, sizes XS and S use 27.5x2.4'' tires, and sizes M, ML, L, and XL use 29x2.4'' tires.
What is the weight of the Trek Marlin 4 Gen 3?
The size M weight is 14.90 kg / 32.85 lbs. The maximum total weight limit is 300 pounds / 136 kg, including the bicycle, rider, and cargo.
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