2021 Trek Bikes Fuel EX 9.8 XL 21.5 (29") Low
Build
700C/29 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
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Geometry
| Stack | 623mm |
| Reach | 500mm |
| Stack to Reach Ratio | 1.25:1 |
| Seat Tube Length, C-T | 500mm |
| Top Tube Length, Effective/Horizontal HT Top | 662mm |
| Top Tube Slope | 12.5deg |
| Head Tube Angle | 66.5deg |
| Seat Tube Angle | 75.5deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 27mm |
| Bottom Bracket Height | 350mm |
| Chainstay Length | 436mm |
| Chainstay Length Horizontal | 435.2mm |
| Front-Center | 806.3mm |
| Front-Center Horizontal | 805.8mm |
| Wheelbase | 1241mm |
| Fork Offset/Rake | 43mm |
| Trail | 117.1mm very high |
| Mechanical Trail | 107.3mm |
| Wheel Flop | 42.8mm |
| Standover Height | 776mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | 254.3mm |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 175mm |
9.8 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 754.1mm |
| Bike Length with Tires | 1995.1mm |
| Crank Length | 175mm |
| Handlebar Width | 780mm |
| Stem Length | 45mm |
| 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 | 186 cm to 196 cm |
| PBH | 87 cm to 92 cm |
Source:https://www.trekbikes.com/ca/en_CA/bikes/mountain-bikes/trail-mountain-bikes/fuel-ex/fuel-ex-9-8-xt/p/33408/