2026 Trek Bikes Marlin 5 gen 3 M
Build
700C/29 in × 2.4 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail cross-country mtb bikes
Design deviates from other sizes of Trek Bikes Marlin
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 609mm |
| Reach | 440mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 420mm |
| Top Tube Length, Effective/Horizontal Center | 615mm |
| Head Tube Angle | 66.5deg |
| Effective Seat Tube Angle, Unknown | 74deg |
| Seat Tube Exit Angle | 73.4deg |
| Head Tube Length | 105mm |
| Bottom Bracket Drop | 46mm |
| Bottom Bracket Height | 326mm |
| Chainstay Length | 438mm |
| Chainstay Length Horizontal | 435.6mm |
| Front-Center | 728.9mm |
| Front-Center Horizontal | 727.4mm |
| Wheelbase | 1163mm |
| Fork Offset/Rake | 46mm |
| Trail | 111.6mm very high |
| Mechanical Trail | 102.3mm |
| Wheel Flop | 40.8mm |
| Standover Height | 747mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 186.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 156mm |
5 gen 3 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1906.9mm |
| Crank Length | 170mm |
| Handlebar Width | 750mm |
| Stem Length | 50mm |
| Stem Angle | 7deg |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/cross-country-mountain-bikes/marlin/f/F321/marlin-5-gen-3/40773/5292507