2018 Trek Bikes X-Caliber 8
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Fork
- Steel
- Suspension
- 100mm fork travel
- Features
- Disc brake
Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
XS | S | M | ML | L | XL | XXL | |
Stack | 566mm | 575mm | 600mm | 600mm | 609mm | 628mm | 628mm |
Reach | 375mm | 384mm | 416mm | 432mm | 449mm | 464mm | 478mm |
Stack to Reach Ratio | 1.51:1 | 1.5:1 | 1.44:1 | 1.39:1 | 1.36:1 | 1.35:1 | 1.31:1 |
Seat Tube Length, Unknown | 343mm | 368mm | 419mm | 444mm | 470mm | 521mm | 559mm |
Top Tube Length, Effective/Horizontal Unknown | 538mm | 564mm | 598mm | 614mm | 634mm | 655mm | 669mm |
Top Tube Slope | 26.6deg | 24.3deg | 20.3deg | 17.3deg | 15.3deg | 12deg | 8.4deg |
Head Tube Angle | 69.2deg | 69.2deg | 69.3deg | 69.3deg | 69.3deg | 69.3deg | 69.3deg |
Seat Tube Angle | 73deg | 71.7deg | 72deg | 72deg | 72deg | 72deg | 72deg |
Head Tube Length | 90mm | 90mm | 90mm | 90mm | 100mm | 120mm | 120mm |
Bottom Bracket Drop | 51.9mm | 41.9mm | 50.9mm | 50.9mm | 50.9mm | 50.9mm | 50.9mm |
Bottom Bracket Height | 296mm | 306mm | 316mm | 316mm | 316mm | 316mm | 316mm |
Chainstay Length | 425mm | 425mm | 438mm | 438mm | 438mm | 438mm | 438mm |
Chainstay Length Horizontal | 421.8mm | 422.9mm | 435mm | 435mm | 435mm | 435mm | 435mm |
Front-Center | 616.4mm | 632.5mm | 676.9mm | 692.8mm | 713.8mm | 735.7mm | 749.7mm |
Front-Center Horizontal | 614.2mm | 631.1mm | 675mm | 691mm | 712mm | 734mm | 748mm |
Wheelbase | 1036mm | 1054mm | 1110mm | 1126mm | 1147mm | 1169mm | 1183mm |
Fork Offset/Rake | 44mm | 44mm | 51mm | 51mm | 51mm | 51mm | 51mm |
Trail | 85.1mm very high | 85.1mm very high | 84.1mm very high | 84.1mm very high | 84.1mm very high | 84.1mm very high | 84.1mm very high |
Mechanical Trail | 79.5mm | 79.5mm | 78.7mm | 78.7mm | 78.7mm | 78.7mm | 78.7mm |
Wheel Flop | 28.2mm | 28.2mm | 27.8mm | 27.8mm | 27.8mm | 27.8mm | 27.8mm |
Standover Height | 708mm | 728mm | 743mm | 737mm | 753mm | 751mm | 773mm |
Tire to Pedal Spindle | 98.5mm 170 mm cranks | 114.6mm 170 mm cranks | 140mm 170 mm cranks | 156mm 170 mm cranks | 176.9mm 170 mm cranks | 198.9mm 170 mm cranks | 212.8mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 126mm 170 mm cranks | 136mm 170 mm cranks | 146mm 170 mm cranks | 146mm 170 mm cranks | 146mm 170 mm cranks | 146mm 170 mm cranks | 146mm 170 mm cranks |
8 Build
XS | S | M | ML | L | XL | XXL | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.2in | 2.2in | 2.2in | 2.2in | 2.2in | 2.2in | 2.2in |
Tire Width Max | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in |
Tire Outer Diameter | 695.8mm | 695.8mm | 733.8mm | 733.8mm | 733.8mm | 733.8mm | 733.8mm |
Bike Length with Tires | 1731.8mm | 1749.8mm | 1843.8mm | 1859.8mm | 1880.8mm | 1902.8mm | 1916.8mm |
Handlebar Width | 720mm | 720mm | 720mm | 720mm | 720mm | 720mm | 720mm |
Stem Angle | 7deg | 7deg | 7deg | 7deg | 7deg | 7deg | 7deg |
Published Sizing Recommendations
Height | 4 ft 9 in to 5 ft 1 in | 5 ft 1 in to 5 ft 5 in | 5 ft 5 in to 5 ft 9 in | 5 ft 8 in to 5 ft 11 in | 5 ft 10 in to 6 ft 2 in | 6 ft 2 in to 6 ft 5 in | 6 ft 5 in to 6 ft 8 in |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Hardtail Cross-country MTBSource:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/cross-country-mountain-bikes/x-caliber/x-caliber-8/p/21577/