2021 Trek Bikes Fuel EX 9.8 S 15.5 (27.5" wheel) Low
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 | 568mm |
| Reach | 420mm |
| Stack to Reach Ratio | 1.35:1 |
| Seat Tube Length, C-T | 395mm |
| Top Tube Length, Effective/Horizontal HT Top | 567mm |
| Top Tube Slope | 19.7deg |
| Head Tube Angle | 66.5deg |
| Seat Tube Angle | 75.5deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 14mm |
| Bottom Bracket Height | 344mm |
| Chainstay Length | 436mm |
| Chainstay Length Horizontal | 435.8mm |
| Front-Center | 707.4mm |
| Front-Center Horizontal | 707.2mm |
| Wheelbase | 1143mm |
| Fork Offset/Rake | 43mm |
| Trail | 108.8mm very high |
| Mechanical Trail | 99.8mm |
| Wheel Flop | 39.8mm |
| Standover Height | 708mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 179.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 174mm |
9.8 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 716.1mm |
| Bike Length with Tires | 1859.1mm |
| Crank Length | 170mm |
| Handlebar Width | 780mm |
| Stem Length | 35mm |
| 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 | 153 cm to 166.5 cm |
| PBH | 72 cm to 79 cm |
Source:https://www.trekbikes.com/ca/en_CA/bikes/mountain-bikes/trail-mountain-bikes/fuel-ex/fuel-ex-9-8-xt/p/33408/