Specialized Fatboy Expert Carbon

Name: Specialized Fatboy Expert Carbon
Brand: Specialized

2018 MountainFat bike Manufacturer page

Last known price: $5,000

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 11 28t / 10–42t
Gear range: 420%
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

13 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

FACT 10m, full carbon frame, 12x197mm thru-axle rear, internal cable routing, ISCG XC tabs Not identified

Suspension

1 part

Fork

Carbon, 46mm offset, tapered steerer, 150mm axle spacing Not identified

Drivetrain

6 parts

Bottom bracket

PF30 Not identified
Cassette
- SRAM XG-1180 MINI CLUSTER 11 speeds 10–42t
XG-1180
Chain
- SRAM XX1
Crankset
- Race Face Next SL 28t
Rear derailleur
- SRAM X01
Shifters
- SRAM X01 Trigger 11 speeds

Brakes

1 part

Brakes
- SRAM Guide R

Wheels and tires

5 parts

Front hub

Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x1150mm, 32h Not identified
Rear hub
- SRAM
Rims
- HED
Spokes

Stainless, butted, 2.0/1.8/2.0mm, black 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
- Specialized
Pedals
- Specialized
Saddle

Phenom Expert, Adaptive Edge design, hollow titanium rails, 143mm Not identified
Seatpost
- Race Face Next SL
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
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

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length 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: 28
Largest chainring: 28
Rear sprockets: 11
Smallest sprocket: 10
Largest sprocket: 42
Lowest gear: 17.3 in
Highest gear: 72.8 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: Carbon
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

17.3 gear inches

This value is within 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

72.8 gear inches

This value is within 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: 6.6 km/h
Highest gear: 27.9 km/h

Total gear range 420%

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: 17.3–72.8 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

Differences across 2018 builds
Specification	This bicycle Specialized Fatboy Expert Carbon	Specialized Fatboy	Specialized Fatboy 20	Specialized Fatboy 24	Specialized Fatboy Comp Carbon	Specialized Fatboy SE
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Carbon	Aluminum
Fork material	Carbon	Carbon	Aluminum	Aluminum	Carbon	Aluminum
Drivetrain
Smallest chainring	28	30	28	28	30	28
Largest chainring	28	30	28	28	30	28
Rear sprockets	11	11	9	9	12	10
Smallest sprocket	10	11	11	11	10	11
Largest sprocket	42	42	36	36	50	42
Lowest gear	17.3 in	18.6 in	15.6 in	18.7 in	15.6 in	17.3 in
Highest gear	72.8 in	70.9 in	50.9 in	61.1 in	78.0 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	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Wheel size	26″	26″	20″	24″	26″	26″