Marlin 4 Gen 3
OverviewAbout the Trek Marlin 4 Gen 3
The Trek Marlin 4 Gen 3 is a mountain bike, built on a aluminium frame, listed at $849.99. An off-road bike for trails, with grippy tyres and trail-ready geometry.
SizingWhat size Marlin 4 Gen 3 do I need?
Enter your height to see the size Trek recommends.
| Size | Rider height | In feet | Inseam |
|---|---|---|---|
| 2XS | 135 to 145 cm | 4 ft 5 in to 4 ft 9 in | 64 to 68 cm |
| XS | 145 to 155 cm | 4 ft 9 in to 5 ft 1 in | 69 to 73 cm |
| S | 155 to 165 cm | 5 ft 1 in to 5 ft 5 in | 74 to 78 cm |
| M | 165 to 177 cm | 5 ft 5 in to 5 ft 10 in | 79 to 83 cm |
| ML | 173 to 180 cm | 5 ft 8 in to 5 ft 11 in | 81 to 86 cm |
| L | 177 to 188 cm | 5 ft 10 in to 6 ft 2 in | 84 to 89 cm |
| XL | 188 to 195 cm | 6 ft 2 in to 6 ft 5 in | 89 to 91 cm |
| 2XL | 195 to 203 cm | 6 ft 5 in to 6 ft 8 in | 91 to 97 cm |
Rider heights from Trek's size chart. Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
- Brand
- Trek
- Model year
- 2026
- Category
- Mountain
- Frame
- Aluminium
- Wheel size
- 29-inch (27.5-inch on the smallest sizes)
- Drivetrain
- Shimano CUES 1x8
- Brakes
- Disc
- Frame sizes
- 2XS, XS, S, M, ML, L, XL, 2XL
- Price
- $849.99, RRP AUD (Trek Australia, checked 16 Oct 2026)
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M
- Stack
- 609 mm
- Reach
- 440 mm
- Stack/reach
- 1.38
- Head angle
- 66.5 deg
- Seat angle
- 74 deg
- Wheelbase
- 1163 mm
- Chainstay
- 438 mm
- BB drop
- 60 mm
- Standover
- 747 mm
- Fork rake
- 46 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- Shimano CUES
- Shifting
- Mechanical
- Drive
- 1x
- Speeds
- 8
- Crank
- ProWheel alloy, 30T narrow-wide steel ring, 170 mm length
- Chainrings
- 30
- Cassette
- Shimano HG300, 11-45, 8-speed
- Rear derailleur
- Shimano ESSA U2000
- Brakes
- Tektro HD-M276 hydraulic disc
- Rotors
- 160/180mm
- Wheelset
- Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
- Stock tyre
- 29x2.40
- Fork material
- SR Suntour XCE 28, coil spring, preload, 46 mm offset for 29" wheel, 100 mm QR, 100 mm travel
- BB standard
- Threaded cartridge
- Seatpost
- Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
- Cockpit
- Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length / Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
- Saddle
- Bontrager Verse Short, stainless steel rails
SuspensionMTB detail
- Front travel
- 100 mm
- Fork
- SR Suntour XCE 28
- Wheel config
- 29
- Dropper
- No, rigid seatpost
- Discipline
- XC
- Suspension
- hardtail
Bike DNAWhat the numbers say
- Steering
- A 66.5 deg head angle points to balanced trail handling.
- Climbing
- Lowest ratio 0.67 is a very low climbing gear for steep or loaded climbs.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (Trek Australia product data 57361 (spec list, geometry chart, size chart)), verified 2026-10-16. This is a specification analysis, not a physical ride review.
Where to buyStockist
BikeFinder is an independent directory. We link to retailers; prices and stock are set by the seller and shown as at the date checked.
