Specialized Fatboy SE

Name: Specialized Fatboy SE
Brand: Specialized

2017 MountainFat bike Manufacturer page

Suspension: Rigid
Wheels: 26″
Drivetrain: 2 × 10 28t / 11–36t
Gear range: 327%
Frame: Aluminum
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

13 of 21 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Specialized M4 aluminum, fully-butted tubing w/smooth welds, tapered head tube, post-mount disc dropouts, 190mm rear hub spacing, replaceable alloy derailleur hanger Not identified

Suspension

1 part

Fork
- Specialized

Drivetrain

7 parts

Bottom bracket

BB30, sealed cartridge bearings Not identified
Cassette
- SunRace 11–36t
Chain
- KMC X10 EPT 10 speeds
Crankset
- Samox
Front derailleur
- SRAM X5 Low Direct Mount 10 speeds
Rear derailleur
- SRAM X5 10 speeds
Shifters
- SRAM X5

Brakes

1 part

Brakes
- Tektro

Wheels and tires

5 parts

Front hub
- Specialized
Rear hub
- Specialized
Rims
- Specialized
Spokes

Stainless, black, 14g Not identified
Tires

Front: Ground Control Fat, 60 TPI, wire bead, 26x4.6"", Rear: Ground Control Fat, 26x4.6"", 60TPI, wire bead Not identified

Cockpit and contact points

6 parts

Grips
- Specialized
Handlebar

Double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm width, 31.8mm Not identified
Pedals
- Specialized
Saddle

Body Geometry Henge Sport, steel rails, 143mm Not identified
Seatpost

Alloy, 12.5mm offset, 2-bolt clamp, 27.2mm Not identified
Stem

Ahead 3D-forged alloy, 31.8mm clamp, 6-degree rise Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 420mm

Stack 600mm

Wheelbase 1111mm

Head angle 70.5°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	395	420	437	458
Stackmm	590	600	614	628
Top tube lengthmm	576	603	625	650
Seat tube lengthmm	394	445	483	533
Head tube lengthmm	110	120	135	150
Head tube angle	70.5°	70.5°	70.5°	70.5°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	455	455	455	455
Wheelbasemm	1083	1111	1133	1159
Front centermm	634	663	685	711
Bottom bracket dropmm	60	60	60	60
Bottom bracket heightmm	316	316	316	316
Standover heightmm	754	786	812	840
Fork rakemm	46	46	46	46
Trailmm	84	84	84	84
Stack/reach ratio	1.49	1.43	1.41	1.37
Suspension and parts
Crank lengthmm	170	175	175	175
Handlebar widthmm	750	750	750	750
Stem lengthmm	60	60	70	70
Seatpost lengthmm	350	350	400	400

Not published by the manufacturer: Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 28
Largest chainring: 28
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 20.2 in
Highest gear: 66.2 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB30
Tire width: 4.6″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

20.2 gear inches

This value is above the central range for this class.

Cohort: Mountain / Fat bike Model year: 2017
Sample: 65 bicycles with this information
Coverage: 95.5% of the class

Highest gear

66.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Fat bike Model year: 2017
Sample: 65 bicycles with this information
Coverage: 95.5% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.7 km/h
Highest gear: 25.3 km/h

Total gear range 327%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 20.2–66.2 gear inches
Class reference (p10–p90): 15.5–86.7 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Fat bike Model year: 2017
Lowest gear: 65 bicycles with this information, 95.5% of the class
Highest gear: 65 bicycles with this information, 95.5% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2017 builds
Specification	This bicycle Specialized Fatboy SE	Specialized Fatboy	Specialized Fatboy Comp Carbon
Frame
Frame material	Aluminum	Aluminum	Carbon
Fork material	Aluminum	Carbon	Carbon
Drivetrain
Front chainrings	2	1	Not informed
Smallest chainring	28	28	Not informed
Largest chainring	28	28	Not informed
Largest sprocket	36	42	42
Lowest gear	20.2 in	17.3 in	Not informed
Highest gear	66.2 in	66.2 in	Not informed
Brakes
Brake type	Mechanical disc	Hydraulic disc	Hydraulic disc
Other specifications
Bottom bracket standard	BB30	BSA	Not informed
Tire width	4.6″	4.6″	4″

Changes since 2016
Specification	2016 Specialized Fatboy SE	This bicycle Specialized Fatboy SE
Drivetrain
Smallest chainring	22	28
Largest chainring	36	28
Lowest gear	15.9 in	20.2 in
Highest gear	85.1 in	66.2 in
Other specifications
Bottom bracket standard	PF30	BB30
Travel	Configuration: Rigid	Configuration: RigidFront: Additional specification: Not available: YesRear: Additional specification: Not available: Yes