2020 Trek Bikes Fuel EX 9.8 XS (27.5" wheel) High
Build
650B/27.5 in × 2.6 in
Insights
Somewhat aggressive stack and reach vs trend of full-suspension trail mtb bikes
Design deviates from other sizes of Trek Bikes Fuel EX
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 563mm |
| Reach | 395mm |
| Stack to Reach Ratio | 1.43:1 |
| Seat Tube Length, C-T | 342.9mm |
| Top Tube Length, Effective/Horizontal HT Top | 550mm |
| Top Tube Slope | 25.6deg |
| Head Tube Angle | 66deg |
| Seat Tube Angle | 75deg |
| Head Tube Length | 90mm |
| Bottom Bracket Drop | 21mm |
| Bottom Bracket Height | 337mm |
| Chainstay Length | 437mm |
| Chainstay Length Horizontal | 436.5mm |
| Front-Center | 683.8mm |
| Front-Center Horizontal | 683.5mm |
| Wheelbase | 1120mm |
| Fork Offset/Rake | 43mm |
| Trail | 112.3mm very high |
| Mechanical Trail | 102.6mm |
| Wheel Flop | 41.7mm |
| Standover Height | 695mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 155.8mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 167mm |
9.8 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 716.1mm |
| Bike Length with Tires | 1836.1mm |
| Crank Length | 170mm |
| Handlebar Width | 780mm |
| Stem Length | 40mm |
| Stem Angle | 0deg |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 140mm |
| Rear Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Carbon/Composite |
| Fork Material | Unknown |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 137 cm to 155 cm |
| PBH | 64 cm to 73 cm |
Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/trail-mountain-bikes/fuel-ex/fuel-ex-9-8/p/29090/?colorCode=green_tan