2026 Trek Bikes Marlin 4 Gen 3 Base ML
Build
700C/29 in × 2.4 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail trail mtb bikes
Design deviates from other sizes of Trek Bikes Marlin 4 Gen 3
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 602mm |
| Reach | 434mm |
| Stack to Reach Ratio | 1.39:1 |
| Seat Tube Length, C-T | 444mm |
| Top Tube Length, Effective/Horizontal Center | 618mm |
| Top Tube Slope | 17.5deg |
| Head Tube Angle | 69.5deg |
| Seat Tube Angle | 71.9deg |
| Seat Tube Exit Angle | 73deg |
| Head Tube Length | 90mm |
| Bottom Bracket Drop | 58mm |
| Bottom Bracket Height | 314mm |
| Chainstay Length | 438mm |
| Chainstay Length Horizontal | 434.1mm |
| Front-Center | 684.3mm |
| Front-Center Horizontal | 681.9mm |
| Wheelbase | 1116mm |
| Fork Offset/Rake | 42mm |
| Trail | 94.2mm very high |
| Mechanical Trail | 88.3mm |
| Wheel Flop | 30.9mm |
| Standover Height | 758mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 142.4mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 144mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1859.9mm |
| Handlebar Width | 750mm |
| Stem Length | 50mm |
| Stem Angle | 7deg |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:https://www.trekbikes.com/gb/en_GB/bikes/mountain-bikes/cross-country-mountain-bikes/marlin/f/F321/marlin-4-gen-3/57361/5336958