Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Specialized
2015 Specialized Fatboy SL
Value Guide market data · 2015 Specialized Fatboy SL
12-month trend
1%
Direction and magnitude, not judgment
vs. category average
1%
Drops faster than category avg
Price over time - 2015 Specialized Fatboy SL
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Fatboy model years
2015 Fatboy SL lineup
Overview
About this bike
2015 Specialized Fatboy SL value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- FRAME
- Specialized M4 Premium Aluminum, fully butted w/ smooth welds, tapered headtube, post-mount disc dropouts, 190mm rear hub spacing, replaceable alloy derailleur hanger
- FORK
- Specialized FACT carbon, full monocoque, tapered steerer, 135mm hub spacing, open QR dropouts
- Fork Brand & Model
- Specialized FACT carbon
- Frame Construction
- Specialized M4 butted aluminum
Drivetrain
- Groupset
- SRAM XX1
- REAR DERAILLEUR
- SRAM XX1, 11-speed, carbon cage
- SHIFT LEVERS
- SRAM XX1, 11-speed, trigger
- CASSETTE
- SRAM XX1, 11-speed, 10-42
- CHAIN
- KMC X11L, 11-speed, w/ reusable MissingLink
- CRANKSET
- Race Face Next SL, PF30 BB, 100mm spindle, 30T, spiderless
- Chainrings
- 30T
- Shifters
- SRAM XX1
Brakes
- FRONT BRAKE
- Magura MT8, hydraulic disc, Hi Friction pad, carbon master cylinder, alloy caliper, Storm SL rotor
- REAR BRAKE
- Magura MT8, hydraulic disc, Hi Friction pad, carbon master cylinder, alloy caliper, Storm SL rotor
- BRAKE LEVERS
- Magura MT8, carbon lever
- Brakes
- Magura MT8 disc, Storm SL rotors
Cockpit
- HEADSET
- 1-1/8"" upper, 1-1/2"" lower, Campy style, integrated sealed cartridge bearings
- SEAT BINDER
- Alloy, 31.6mm
- STEM
- Specialized Stout XC, 3D forged alloy, 4-bolt, 6-degree rise, anti-corriosion hardware
- HANDLEBARS
- Specialized flat, carbon, 8-degree backsweep, 31.8mm
- GRIPS
- Specialized Sip Grip, light lock-on, half-waffle, S/M: regular thickness, Others: XL
- SADDLE
- Body Geometry Phenom Expert, hollow Ti rails, 143mm
- SEATPOST
- S-Works FACT carbon, 20mm offset, 27.2mm
- Handlebar
- Specialized flat, carbon
Wheels & Tires
- RIMS
- HED Big Deal, carbon, single wall, tubeless, 85mm wide, 32h
- FRONT HUB
- Specialized Stout XC 135, Hi Lo disc, alloy, sealed cartridge bearings, QR, 32h
- REAR HUB
- Specialized Stout XC 190, Hi Lo disc, alloy, sealed cartridge bearings, QR, 32h
- SPOKES
- Stainless, butted, 2.0/1.8/2.0mm, black
- FRONT TIRE
- Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6""
- REAR TIRE
- 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-inches
- Wheel Set
- HED Big Deal, carbon
Pedals
- PEDALS
- Alloy, 1 pc. body, 9/16"", w/ reflectors
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.