Trek Marlin 4 Gen 2 2025
2025 Mountain
Estimate price |
639$
Weight | 14.6 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
Category -
Frame Aluminum -
Travel Front 100mm -
Fork Suntour XCE
-
Groupset Tourney, Altus -
Suspension Hardtail -
Drivetrain 2 × 7 -
Brakes Mechanical Disc
Sizing
Recommended size guide.
13.5"
145cm - 156cm
15.5"
154cm - 166cm
17.5"
164cm - 176cm
18.5"
173cm - 180cm
19.5"
177cm - 189cm
21.5"
187cm - 196cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Size: XS, S, Alpha Silver Aluminum, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR; Size: M, ML, L, XL, Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR
Suspension Fork
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; Size: M, ML, L, XL, SR Suntour XCE 28, coil spring, preload, 46mm offset for 29'' wheel, 100mm QR, 100mm travel
Drivetrain
Rear Derailleur
Shimano Tourney TY300
Front Derailleur
Shimano Altus M315, 34.9mm clamp, top swing, dual pull
Shift Levers
Size: XS, S, M, ML, L, XL, Shimano EF500, 8 speed; Size: XS, S, M, ML, L, XL, Shimano EF500, 7 speed
Cassette
Shimano TZ500, 14-34, 7 speed
Crank
Size: XS, S, M, ProWheel TM-CY10, 36/22, 170mm length; Size: ML, L, XL, ProWheel TM-CY10, 36/22, 175mm length
Bottom Bracket
VP BC73, 73mm, threaded cartridge
Chain
KMC Z7, 7 speed
Pedals
VP-536 nylon platform
Wheels
Front Hub
Formula DC-20, alloy, 6-bolt, 5x100mm QR
Rear Hub
Formula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel, 135x5mm QR
Rims
Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve
Spokes
14g stainless steel, black
Tires
Size: XS, S, Bontrager XR2 Comp, wire bead, 30 tpi, 27.5x2.20''; Size: M, ML, L, XL, Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.20''
Brakes
Brakes
Size: XS, S, M, ML, L, XL, Tektro MD-M280 mechanical disc; Size: XS, S, M, ML, L, XL, Tektro MD-M281 mechanical disc; Size: XS, S, M, ML, L, XL, Tektro MD-M280 mechanical disc, 160mm rotor; Size: XS, S, M, ML, L, XL, Tektro MD-M281 mechanical disc, 160mm rotor
Cockpit
Stem
Size: XS, S, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: M, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: ML, L, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: XL, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 80mm length
Handlebar
Size: XS, S, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: M, ML, L, XL, Bontrager alloy, 31.8mm, 15mm rise, 750mm width
Grips
Bontrager XR Endurance Comp, lock-on
Headset
Semi-integrated, 1-1/8''
Seat
Saddle
Bontrager Verse Short, stainless steel rails
Seatpost
Size: XS, S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: ML, L, XL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 13.5" | 15.5" | 17.5" | 18.5" | 19.5" | 21.5" |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.503 mm | 1.491 mm | 1.44 mm | 1.387 mm | 1.355 mm | 1.352 mm |
| Bottom Bracket Height | 292 mm | 302 mm | 310 mm | 310 mm | 310 mm | 310 mm |
| Front Center | 618 mm | 632 mm | 668 mm | 684 mm | 705 mm | 727 mm |
| Rake | 44 mm | 44 mm | 42 mm | 42 mm | 42 mm | 42 mm |
| Trail | 88 mm | 88 mm | 93 mm | 93 mm | 93 mm | 93 mm |
| Stack | 565 mm | 574 mm | 602 mm | 602 mm | 611 mm | 630 mm |
| Reach | 376 mm | 385 mm | 418 mm | 434 mm | 451 mm | 466 mm |
| Top Tube Length | 544 mm | 555 mm | 602 mm | 618 mm | 638 mm | 659 mm |
| Seat Tube Angle | 73.5 ° | 73.5 ° | 73 ° | 73 ° | 73 ° | 73 ° |
| Seat Tube Length | 343 mm | 368 mm | 419 mm | 444 mm | 470 mm | 521 mm |
| Head Tube Angle | 69.3 ° | 69.3 ° | 69.5 ° | 69.5 ° | 69.5 ° | 69.5 ° |
| Head Tube Length | 90 mm | 90 mm | 90 mm | 90 mm | 100 mm | 120 mm |
| Chainstay Length | 438 mm | 438 mm | 438 mm | 438 mm | 438 mm | 438 mm |
| Wheelbase | 1049 mm | 1066 mm | 1100 mm | 1116 mm | 1137 mm | 1159 mm |
| Bottom Bracket Drop | 58 mm | 48 mm | 58 mm | 58 mm | 58 mm | 58 mm |
| Standover Height | 658 mm | 686 mm | 748 mm | 758 mm | 757 mm | 769 mm |
| Wheels | 27" | 27" | 29" | 29" | 29" | 29" |
| Rider Min Height | 145 cm | 154 cm | 164 cm | 173 cm | 177 cm | 187 cm |
| Rider Max Height | 156 cm | 166 cm | 176 cm | 180 cm | 189 cm | 196 cm |