2026 Trek Bikes Marlin 5 gen 3
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Suspension
- 100mm fork travel
- Features
- Disc brake
Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
XS | s | M | ML | L | XL | |
Stack | 563mm | 572mm | 609mm | 614mm | 618mm | 637mm |
Reach | 390mm | 415mm | 440mm | 455mm | 470mm | 495mm |
Stack to Reach Ratio | 1.44:1 | 1.38:1 | 1.38:1 | 1.35:1 | 1.31:1 | 1.29:1 |
Seat Tube Length, C-T | 340mm | 370mm | 420mm | 435mm | 450mm | 500mm |
Top Tube Length, Effective/Horizontal Center | 551mm | 579mm | 615mm | 631mm | 647mm | 678mm |
Head Tube Angle | 66.5deg | 66.5deg | 66.5deg | 66.5deg | 66.5deg | 66.5deg |
Effective Seat Tube Angle, Unknown | 74deg | 74deg | 74deg | 74deg | 74deg | 74deg |
Seat Tube Exit Angle | 73.8deg | 73.8deg | 73.4deg | 73.4deg | 73.4deg | 73.4deg |
Head Tube Length | 90mm | 100mm | 105mm | 110mm | 115mm | 135mm |
Bottom Bracket Drop | 45mm | 45mm | 46mm | 46mm | 46mm | 46mm |
Bottom Bracket Height | 308mm | 308mm | 326mm | 326mm | 326mm | 326mm |
Chainstay Length | 433mm | 433mm | 438mm | 438mm | 438mm | 438mm |
Chainstay Length Horizontal | 430.7mm | 430.7mm | 435.6mm | 435.6mm | 435.6mm | 435.6mm |
Front-Center | 662.9mm | 691.8mm | 728.9mm | 745.8mm | 762.8mm | 795.8mm |
Front-Center Horizontal | 661.3mm | 690.3mm | 727.4mm | 744.4mm | 761.4mm | 794.4mm |
Wheelbase | 1092mm | 1121mm | 1163mm | 1180mm | 1197mm | 1230mm |
Fork Offset/Rake | 42mm | 42mm | 46mm | 46mm | 46mm | 46mm |
Trail | 107.7mm very high | 107.7mm very high | 111.6mm very high | 111.6mm very high | 111.6mm very high | 111.6mm very high |
Mechanical Trail | 98.7mm | 98.7mm | 102.3mm | 102.3mm | 102.3mm | 102.3mm |
Wheel Flop | 39.4mm | 39.4mm | 40.8mm | 40.8mm | 40.8mm | 40.8mm |
Standover Height | 658mm | 692mm | 747mm | 759mm | 771mm | 791mm |
Tire to Pedal Spindle | 149.9mm 160 mm cranks | 168.9mm 170 mm cranks | 186.9mm 170 mm cranks | 203.9mm 170 mm cranks | 220.9mm 170 mm cranks | 253.8mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 148mm 160 mm cranks | 138mm 170 mm cranks | 156mm 170 mm cranks | 156mm 170 mm cranks | 156mm 170 mm cranks | 156mm 170 mm cranks |
5 gen 3 Build
XS | s | M | ML | L | XL | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in |
Tire Width Max | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in |
Tire Outer Diameter | 705.9mm | 705.9mm | 743.9mm | 743.9mm | 743.9mm | 743.9mm |
Bike Length with Tires | 1797.9mm | 1826.9mm | 1906.9mm | 1923.9mm | 1940.9mm | 1973.9mm |
Crank Length | 160mm | 170mm | 170mm | 170mm | 170mm | 170mm |
Handlebar Width | 690mm | 720mm | 750mm | 750mm | 750mm | 750mm |
Stem Length | 35mm | 35mm | 50mm | 50mm | 50mm | 60mm |
Stem Angle | 7deg | 7deg | 7deg | 7deg | 7deg | 7deg |
Published Sizing Recommendations
Height | 145 cm to 155 cm | — | — | — | — | — |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Hardtail Cross-country MTBSource:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/cross-country-mountain-bikes/marlin/f/F321/marlin-5-gen-3/40773/5292507