2026 Trek Bikes Roscoe 8 Gen 4 XL
Build
700C/29 in × 2.4 in
Insights
Very upright stack and reach vs trend of hardtail trail mtb bikes
Design deviates from other sizes of Trek Bikes Roscoe
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 684mm |
| Reach | 500mm |
| Stack to Reach Ratio | 1.37:1 |
| Seat Tube Length, C-T | 450mm |
| Top Tube Length, Effective/Horizontal Center | 655mm |
| Top Tube Slope | 22deg |
| Head Tube Angle | 65deg |
| Seat Tube Angle | 75.1deg |
| Seat Tube Exit Angle | 77deg |
| Head Tube Length | 145mm |
| Bottom Bracket Drop | 61mm |
| Bottom Bracket Height | 311mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 425.7mm |
| Front-Center | 841.6mm |
| Front-Center Horizontal | 839.4mm |
| Wheelbase | 1265mm |
| Fork Offset/Rake | 44mm |
| Trail | 124.9mm very high |
| Mechanical Trail | 113.2mm |
| Wheel Flop | 47.8mm |
| Standover Height | 740mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 299.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 141mm |
8 Gen 4 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 2008.9mm |
| Crank Length | 170mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 150mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/trail-mountain-bikes/roscoe/f/F342/roscoe-8-gen-4/59872/5341548