2011 Centurion Backfire 100
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Suspension
- 100mm fork travel
- Features
- Rim 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 | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Very upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Very upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
36 cm | 41 cm | 46 cm | 51 cm | 56 cm | 61 cm | |
Stack | 563.9mm | 580.1mm | 594.2mm | 610.5mm | 638.8mm | 667.1mm |
Reach | 381.7mm | 392.3mm | 402.1mm | 406.1mm | 406mm | 400mm |
Stack to Reach Ratio | 1.48:1 | 1.48:1 | 1.48:1 | 1.5:1 | 1.57:1 | 1.67:1 |
Seat Tube Length, C-T | 360mm | 410mm | 460mm | 510mm | 560mm | 610mm |
Seat Tube Length, C-C | 275mm | 325mm | 375mm | 425mm | 475mm | 525mm |
Top Tube Length, Effective/Horizontal HT Top | 550mm | 570mm | 590mm | 605mm | 620mm | 630mm |
Head Tube Angle | 69.5deg | 70deg | 70deg | 70.5deg | 70.5deg | 70.5deg |
Seat Tube Angle | 73.5deg | 73deg | 72.5deg | 72deg | 71.5deg | 71deg |
Head Tube Length | 95mm | 110mm | 125mm | 140mm | 170mm | 200mm |
Bottom Bracket Drop | 30mm | 30mm | 30mm | 30mm | 30mm | 30mm |
Bottom Bracket Height | 299mm | 299mm | 299mm | 299mm | 299mm | 299mm |
Chainstay Length | 425mm | 425mm | 425mm | 425mm | 425mm | 425mm |
Chainstay Length Horizontal | 423.9mm | 423.9mm | 423.9mm | 423.9mm | 423.9mm | 423.9mm |
Front-Center | 624.8mm | 635.8mm | 650.8mm | 654.8mm | 664.7mm | 668.7mm |
Front-Center Horizontal | 624.1mm | 635.1mm | 650.1mm | 654.1mm | 664.1mm | 668.1mm |
Wheelbase | 1048mm | 1059mm | 1074mm | 1078mm | 1088mm | 1092mm |
Fork Offset/Rake | 40mm | 40mm | 40mm | 40mm | 40mm | 40mm |
Fork Length (On-Axis) | 470mm | 470mm | 470mm | 470mm | 470mm | 470mm |
Trail | 80.3mm very high | 77.2mm high | 77.2mm high | 74.1mm high | 74.1mm high | 74.1mm high |
Mechanical Trail | 75.2mm | 72.5mm | 72.5mm | 69.8mm | 69.8mm | 69.8mm |
Wheel Flop | 26.4mm | 24.8mm | 24.8mm | 23.3mm | 23.3mm | 23.3mm |
Tire to Pedal Spindle | 125.8mm 170 mm cranks | 136.7mm 170 mm cranks | 151.7mm 170 mm cranks | 150.7mm 175 mm cranks | 165.7mm 170 mm cranks | 169.7mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 129mm 170 mm cranks | 129mm 170 mm cranks | 129mm 170 mm cranks | 124mm 175 mm cranks | 129mm 170 mm cranks | 129mm 170 mm cranks |
100 Build
36 cm | 41 cm | 46 cm | 51 cm | 56 cm | 61 cm | |
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 1.95in | 1.95in | 1.95in | 1.95in | 1.95in | 1.95in |
Tire Outer Diameter | 658.1mm | 658.1mm | 658.1mm | 658.1mm | 658.1mm | 658.1mm |
Bike Length with Tires | 1706.1mm | 1717.1mm | 1732.1mm | 1736.1mm | 1746.1mm | 1750.1mm |
Crank Length | — | — | — | 175mm | — | — |
Stem Angle | 17deg | 17deg | 17deg | 17deg | 17deg | 17deg |
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:http://web.archive.org/web/20110602114548/http://centurion.de/en_int/bikes/2011/27/MTB+Hardtails/Backfire+100#Geos