Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Specialized
2015 Specialized Fatboy Expert
Value Guide market data · 2015 Specialized Fatboy Expert
12-month trend
2%
Direction and magnitude, not judgment
vs. category average
14%
Holds value better than category avg
Price over time - 2015 Specialized Fatboy Expert
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Fatboy model years
2015 Fatboy Expert lineup
Overview
About this bike
2015 Specialized Fatboy Expert value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- FORK
- Specialized FACT carbon, full monocoque, tapered steerer, 135mm hub spacing
- Frame
- Specialized M4 butted aluminum
Drivetrain
- Groupset
- Shimano Deore
- FRONT DERAILLEUR
- SRAM X7, 2x10, low direct mount
- REAR DERAILLEUR
- SRAM X0 Type 2, 10-speed, medium cage
- SHIFT LEVERS
- SRAM S-Series, Grip Shift, 10-speed
- CASSETTE
- Sunrace, 10-speed, 11-36
- CHAIN
- KMC X10L, 10-speed, reusable Missing Link
- CRANKSET
- Custom e.thirteen, TRS+, PF30, 100mm spindle, w/ BB, 104/64mm BCD spider
- CHAINRINGS
- Praxis, 36/22, alloy
- Shifters
- SRAM Grip Shift
Brakes
- BRAKE LEVERS
- Shimano Deore BL-M506, hydraulic, w/ reach adjust
- FRONT BRAKE
- Shimano Deore BR-M506, hydraulic disc, dual piston, resin pads
- REAR BRAKE
- Shimano Deore BR-M506, hydraulic disc, dual piston, resin pads
- Brakes
- Shimano Deore hydraulic disc, 7/6-inch rotors
Cockpit
- HEADSET
- 1-1/8" upper, 1-1/2" lower, Campy style, integrated sealed cartridge bearings, split crown race, 3.8mm cone spacer
- STEM
- Specialized, 3D forged alloy, 4-bolt, 6-degree rise, anti-corrosion hardware
- HANDLEBARS
- Specialized, low rise, double butted 6061 alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 31.8mm
- GRIPS
- SRAM, S-Series Grip Shift, 92mm
- SADDLE
- Body Geometry mountain, hollow Cr-Mo rails, 143mm
- SEATPOST
- Alloy, 2-bolt, 12.5mm offset, 30.9mm, anti-corrosion hardware
- SEAT BINDER
- Alloy, 34.9mm
- Handlebar
- Specialized mini riser, aluminum
Wheels & Tires
- RIMS
- Specialized Fatboy SL, alloy disc, single wall, 90mm wide, sleeve joint, hookless design, 32h
- FRONT HUB
- Specialized MTB Hi Lo disc, alloy, sealed cartridge bearings, 135mm wide, QR, 32h
- SPOKES
- Stainless, 2.0/1.8/2.0mm
- FRONT TYRE
- Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6"
- REAR TYRE
- Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6"
- INNER TUBES
- Standard, presta valve
- Hubs
- Specialized MTB disc, aluminum
- Tires
- Specialized Ground Control, 26 x 4.6
- Wheel Set
- Specialized Fatboy SL aluminum
Pedals
- PEDALS
- Specialized Bennies, 6061 alloy body, sealed cartridge, 4.5mm removable pins
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.