2018 Specialized Bicycles Fatboy Base S
Build
26 in × 4.6 in
Insights
Average stack and reach vs trend of hardtail fatbike bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 602mm |
| Reach | 395mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, Unknown | 394mm |
| Top Tube Length, Effective/Horizontal Center | 579mm |
| Top Tube Slope | 23.8deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 94mm |
| Bottom Bracket Drop | 60mm |
| Bottom Bracket Height | 336.3mm |
| Chainstay Length | 455mm |
| Chainstay Length Horizontal | 451mm |
| Front-Center | 640mm |
| Front-Center Horizontal | 637mm |
| Wheelbase | 1088mm |
| Fork Offset/Rake | 47mm |
| Fork Length, Unknown | 496mm |
| Trail | 86.8mm very high |
| Mechanical Trail | 82mm |
| Wheel Flop | 26.7mm |
| Standover Height | 765mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 73.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 166.3mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 4.6in |
| Tire Outer Diameter | 792.7mm |
| Bike Length with Tires | 1880.7mm |
| Crank Length | 170mm |
| Handlebar Width | 750mm |
| Stem Length | 60mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
Source:https://www.specialized.com/us/en/fatboy/p/154356?color=236237-154356