2018 Specialized Bicycles Fatboy Base
- Category
- Hardtail Fatbike
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Fork
- Aluminum
- Suspension
- 100mm fork travel
- Features
- Disc brake
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 | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
S | M | L | XL | |
Stack | 602mm | 602mm | 617mm | 632mm |
Reach | 395mm | 420mm | 437mm | 458mm |
Stack to Reach Ratio | 1.52:1 | 1.43:1 | 1.41:1 | 1.38:1 |
Seat Tube Length, Unknown | 394mm | 434mm | 470mm | 520mm |
Top Tube Length, Effective/Horizontal Center | 579mm | 604mm | 626mm | 651mm |
Top Tube Slope | 23.8deg | 18.9deg | 16.3deg | 12.5deg |
Head Tube Angle | 71deg | 71deg | 71deg | 71deg |
Seat Tube Angle | 73deg | 73deg | 73deg | 73deg |
Head Tube Length | 94mm | 94mm | 110mm | 125mm |
Bottom Bracket Drop | 60mm | 60mm | 60mm | 60mm |
Bottom Bracket Height | 336.3mm | 336.3mm | 336.3mm | 336.3mm |
Chainstay Length | 455mm | 455mm | 455mm | 455mm |
Chainstay Length Horizontal | 451mm | 451mm | 451mm | 451mm |
Front-Center | 640mm | 665mm | 687mm | 713mm |
Front-Center Horizontal | 637mm | 662mm | 684mm | 710mm |
Wheelbase | 1088mm | 1113mm | 1135mm | 1161mm |
Fork Offset/Rake | 47mm | 47mm | 47mm | 47mm |
Fork Length, Unknown | 496mm | 496mm | 496mm | 496mm |
Trail | 86.8mm very high | 86.8mm very high | 86.8mm very high | 86.8mm very high |
Mechanical Trail | 82mm | 82mm | 82mm | 82mm |
Wheel Flop | 26.7mm | 26.7mm | 26.7mm | 26.7mm |
Standover Height | 765mm | 786mm | 813mm | 847mm |
Tire to Pedal Spindle | 73.7mm 170 mm cranks | 93.7mm 175 mm cranks | 115.7mm 175 mm cranks | 141.7mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 166.3mm 170 mm cranks | 161.3mm 175 mm cranks | 161.3mm 175 mm cranks | 161.3mm 175 mm cranks |
Base Build
S | M | L | XL | |
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 4.6in | 4.6in | 4.6in | 4.6in |
Tire Outer Diameter | 792.7mm | 792.7mm | 792.7mm | 792.7mm |
Bike Length with Tires | 1880.7mm | 1905.7mm | 1927.7mm | 1953.7mm |
Crank Length | 170mm | 175mm | 175mm | 175mm |
Handlebar Width | 750mm | 750mm | 750mm | 750mm |
Stem Length | 60mm | 60mm | 70mm | 70mm |
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 FatbikeSource:https://www.specialized.com/us/en/fatboy/p/154356?color=236237-154356