Bicycle Archive · Specification report

2017 Specialized Fatboy

Velopedia Archive ID 900003839

Overview

Model year	2017
Brand	Specialized
Model	Fatboy
Bicycle type	Mountain
Archive ID	900003839
Colors	Gloss Black / Baby Blue / Rocket Red; Gloss White / Black / Nordic Red
Sizes	S; M; L; XL

Frameset

Frame construction	M5 Aluminum, fully butted w/smooth welding, tapered head tube and seat tube, 100mm of travel, forged post mount 160mm disc drop outs, internal routing, forged bottom bracket shell, 197x12mm thru-axle rear
Frame material	Aluminum
Fork	Specialized FACT carbon, 46mm offset, tapered steerer, 150mm axle
Fork material	Carbon Fiber

Drivetrain

Shifters	SRAM X7, 10-speed, trigger
Rear derailleur	SRAM X7 Type 2.1, long cage, 10-speed
Crankset	RaceFace Aeffect Cinch, 28T chainring, 11-speed, threaded BB
Cassette	Sunrace, 10-speed, 11-42t
Chain	10-speed, extra lightweight hollow outer links w/reusable Missing Link # CL559R
Pedals	Specialized Dirt Pedals

Brakes

Brakes	(F) Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 180mm rotor / (R) Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 160mm rotor

Cockpit & contact points

Handlebar	Stout Pro Riser, double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm width, 31.8mm
Stem	Specialized Alloy, 3D forged, 4-bolt, 6-degree
Saddle	Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm
Seatpost	Specialized 2-bolt head, forged alloy, 8mm offset, micro-adjust, 30.9mm

Wheels & tires

Hubs	(F) Specialized Stout XC, alloy disc, double-sealed cartridge bearings, 15x150mm thru-axle, 32h / (R) Stout XC 197, disc alloy, sealed cartridge bearings, 12x197mm thru-axle, 32h
Rims	Specialized 26"" disc front, 21mm depth, 86mm internal width, 32h
Spokes	Stainless, black, 14g
Front tire	Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.6""
Rear tire	Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.6""

Geometry · S

Seat tube	394 mm
Effective top tube	576 mm
Head tube	110 mm
Head-tube angle	70.5°
Seat-tube angle	73°
Chainstay / rear center	455 mm
Wheelbase	1083 mm
Bottom-bracket drop	60 mm
Bottom-bracket height	316 mm
Reach	395 mm
Stack	590 mm
Fork offset / rake	46 mm
Front center	634 mm
Trail	84 mm
Fork length / axle-to-crown	467 mm
Seatpost length	350 mm
Crank length	170 mm
Stem length	60 mm
Handlebar width	750 mm

Geometry · M

Seat tube	445 mm
Effective top tube	603 mm
Head tube	120 mm
Head-tube angle	70.5°
Seat-tube angle	73°
Chainstay / rear center	455 mm
Wheelbase	1111 mm
Bottom-bracket drop	60 mm
Bottom-bracket height	316 mm
Reach	420 mm
Stack	600 mm
Fork offset / rake	46 mm
Front center	663 mm
Trail	84 mm
Fork length / axle-to-crown	467 mm
Seatpost length	350 mm
Crank length	175 mm
Stem length	60 mm
Handlebar width	750 mm

Geometry · L

Seat tube	483 mm
Effective top tube	625 mm
Head tube	135 mm
Head-tube angle	70.5°
Seat-tube angle	73°
Chainstay / rear center	455 mm
Wheelbase	1133 mm
Bottom-bracket drop	60 mm
Bottom-bracket height	316 mm
Reach	437 mm
Stack	614 mm
Fork offset / rake	46 mm
Front center	685 mm
Trail	84 mm
Fork length / axle-to-crown	467 mm
Seatpost length	400 mm
Crank length	175 mm
Stem length	70 mm
Handlebar width	750 mm

Geometry · XL

Seat tube	533 mm
Effective top tube	650 mm
Head tube	150 mm
Head-tube angle	70.5°
Seat-tube angle	73°
Chainstay / rear center	455 mm
Wheelbase	1159 mm
Bottom-bracket drop	60 mm
Bottom-bracket height	316 mm
Reach	458 mm
Stack	628 mm
Fork offset / rake	46 mm
Front center	711 mm
Trail	84 mm
Fork length / axle-to-crown	467 mm
Seatpost length	400 mm
Crank length	175 mm
Stem length	70 mm
Handlebar width	750 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 27, 2026.