2018 Trek Bikes X-Caliber 8 XS
Build
650B/27.5 in × 2.2 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail cross-country mtb bikes
Design deviates from other sizes of Trek Bikes X-Caliber
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 566mm |
| Reach | 375mm |
| Stack to Reach Ratio | 1.51:1 |
| Seat Tube Length, Unknown | 343mm |
| Top Tube Length, Effective/Horizontal Unknown | 538mm |
| Top Tube Slope | 26.6deg |
| Head Tube Angle | 69.2deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 90mm |
| Bottom Bracket Drop | 51.9mm |
| Bottom Bracket Height | 296mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 421.8mm |
| Front-Center | 616.4mm |
| Front-Center Horizontal | 614.2mm |
| Wheelbase | 1036mm |
| Fork Offset/Rake | 44mm |
| Trail | 85.1mm very high |
| Mechanical Trail | 79.5mm |
| Wheel Flop | 28.2mm |
| Standover Height | 708mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 98.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 126mm |
8 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.2in |
| Tire Outer Diameter | 695.8mm |
| Bike Length with Tires | 1731.8mm |
| Handlebar Width | 720mm |
| Stem Angle | 7deg |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Steel |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 4 ft 9 in to 5 ft 1 in |
Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/cross-country-mountain-bikes/x-caliber/x-caliber-8/p/21577/