2025 Trek Bikes Top Fuel 8 S (Low)
Build
650B/27.5 in × 2.4 in
Insights
Somewhat aggressive stack and reach vs trend of full-suspension trail mtb bikes
Design deviates from other sizes of Trek Bikes Top Fuel
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 570mm |
| Reach | 417mm |
| Stack to Reach Ratio | 1.37:1 |
| Seat Tube Length, C-T | 360mm |
| Top Tube Length, Effective/Horizontal HT Top | 559mm |
| Top Tube Slope | 23.2deg |
| Head Tube Angle | 65.5deg |
| Seat Tube Angle | 69deg |
| Effective Seat Tube Angle, Unknown | 76deg |
| Head Tube Length | 105mm |
| Bottom Bracket Drop | 16mm |
| Bottom Bracket Height | 337mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 434.7mm |
| Front-Center | 716.5mm |
| Front-Center Horizontal | 716.3mm |
| Wheelbase | 1151mm |
| Fork Offset/Rake | 44mm |
| Fork Length, Unknown | 541mm |
| Trail | 112.5mm very high |
| Mechanical Trail | 102.4mm |
| Wheel Flop | 42.5mm |
| Standover Height | 700mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 193.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 167mm |
8 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 705.9mm |
| Bike Length with Tires | 1856.9mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 130mm |
| Rear Travel | 120mm |
| Suspension Sag | Unknown |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Published Sizing Recommendations
| Height | 155 cm to 165 cm |
Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/trail-mountain-bikes/top-fuel/top-fuel-8/p/46143/?colorCode=greenlight