Specialized Fatboy Comp Carbon

Name: Specialized Fatboy Comp Carbon
Brand: Specialized

2018 MountainFat bike Manufacturer page

Last known price: $3,000

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 12 30t / 10–50t
Gear range: 500%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

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

Components

12 of 20 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 FACT 10m, 12x197mm thru-axle rear, internal cable routing, ISCG XC tabs Not identified

Suspension

1 part

Fork
- Specialized

Drivetrain

6 parts

Bottom bracket

PF30 Not identified
Cassette
- SRAM XG-1275 Eagle 12 speeds 10–50t
XG-1275
Chain
- SRAM Eagle PowerLock 12 speeds
Crankset
- Race Face 30t
Rear derailleur
- SRAM GX Eagle 12 speeds
Shifters
- SRAM GX Eagle Trigger 12 speeds

Brakes

1 part

Brakes
- SRAM Level TL

Wheels and tires

5 parts

Front hub

Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x150mm, 32h Not identified
Rear hub
- SRAM
Rims

Stout XC 80, 26", alloy, 76mm internal width, disc-specific Not identified
Spokes

Stainless, 14g Not identified
Tires

Front: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.0", Rear: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.0" Not identified

Cockpit and contact points

6 parts

Grips
- Specialized
Handlebar

Stout XC, double-butted alloy, 8-degree backsweep, 6-degree upsweep, 10mm rise, 31.8mm Not identified
Pedals
- Specialized
Saddle
- Ritchey Comp
Seatpost

Alloy, 2-bolt clamp, 12.5mm offset, 30.9mm, anti-corrosion hardware Not identified
Stem
- Specialized

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 420mm

Stack 602mm

Wheelbase 1113mm

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	602	602	617	632
Top tube lengthmm	579	604	626	651
Seat tube lengthmm	394	434	470	520
Head tube lengthmm	94	94	110	125
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	1088	1113	1135	1161
Front centermm	640	665	687	713
Bottom bracket dropmm	60	60	60	60
Bottom bracket heightmm	307	307	307	307
Standover heightmm	738.5	752	778.3	807.5
Fork rakemm	47	47	47	47
Trailmm	80	80	80	80
Stack/reach ratio	1.52	1.43	1.41	1.38
Suspension and parts
Crank lengthmm	170	175	175	175
Handlebar widthmm	750	750	750	750
Stem lengthmm	60	60	75	75
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: Carbon
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 50
Lowest gear: 15.6 in
Highest gear: 78.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: PF30
Tire width: 4″
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

15.6 gear inches

This value is below the central range for this class.

Cohort: Mountain / Fat bike Model year: 2018
Sample: 60 bicycles with this information
Coverage: 98.3% of the class

Highest gear

78.0 gear inches

This value is above the central range for this class.

Cohort: Mountain / Fat bike Model year: 2018
Sample: 60 bicycles with this information
Coverage: 98.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.0 km/h
Highest gear: 29.9 km/h

Total gear range 500%

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: 15.6–78.0 gear inches
Class reference (p10–p90): 14.9–85.1 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Fat bike Model year: 2018
Lowest gear: 60 bicycles with this information, 98.3% of the class
Highest gear: 60 bicycles with this information, 98.3% 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 2018 builds
Specification	This bicycle Specialized Fatboy Comp Carbon	Specialized Fatboy	Specialized Fatboy 20	Specialized Fatboy 24	Specialized Fatboy Expert Carbon	Specialized Fatboy SE
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Carbon	Aluminum
Fork material	Carbon	Carbon	Aluminum	Aluminum	Carbon	Aluminum
Drivetrain
Smallest chainring	30	30	28	28	28	28
Largest chainring	30	30	28	28	28	28
Rear sprockets	12	11	9	9	11	10
Smallest sprocket	10	11	11	11	10	11
Largest sprocket	50	42	36	36	42	42
Lowest gear	15.6 in	18.6 in	15.6 in	18.7 in	17.3 in	17.3 in
Highest gear	78.0 in	70.9 in	50.9 in	61.1 in	72.8 in	66.2 in
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Mechanical disc	Mechanical disc	Hydraulic disc	Mechanical disc
Other specifications
Bottom bracket standard	PF30	BSA	BSA	BSA	PF30	PF30
Tire width	4″	4.6″	4″	4″	4″	4.6″
Wheel material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon	Aluminum
Wheel size	26″	26″	20″	24″	26″	26″

Changes since 2017
Specification	2017 Specialized Fatboy Comp Carbon	This bicycle Specialized Fatboy Comp Carbon
Drivetrain
Rear sprockets	10	12
Smallest sprocket	11	10
Largest sprocket	42	50
Front chainrings	Not informed	1
Smallest chainring	Not informed	30
Largest chainring	Not informed	30
Lowest gear	Not informed	15.6 in
Highest gear	Not informed	78.0 in
Other specifications
Bottom bracket standard	Not informed	PF30