Fatboy Se

Fatboy Se

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It’s simple: fat tires—really fat tires—equal more fun. Especially if you define fun as insane levels of traction and rides that take you deep into places you never dreamed bikes could go. We built the Fatboy SE with durable, no-nonsense components that perform season after season.


It boils down to a single word: adventure. The Fatboy’s massive tires (26x4.6”) float over rocks, roots, sand, snow, ice…. Let’s put it this way, if it’s part of mother earth, those big tires will roll right over it with a mix of comfort and traction that’s unrivaled. Get out there.

• Premium, M5 alloy frame is light on the scales, yet holds up to any adventure.

• Alloy fork with air-formed legs pairs perfectly with fat tires to erase trail chatter.

• Shimano single-ring 10-speed drivetrain is simple, accurate and reliable.


Frame Specialized M5 Aluminum, fully butted w/ Smooth Welds, tapered head tube and seat tube, forged post-mount 160mm disc dropouts, internal routing, forged bottom bracket shell, 197x12mm rear thru-axle
Seat Binder Alloy, bolt-type, 34.9mm
Fork Specialized Alloy, 47mm offset, tapered steerer, 150mm axle
Handlebars Stout Riser, double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm / 780mm width, 31.8mm
Stem Stout 3D-forged alloy, 31.8mm, 6-degree rise
Saddle Specialized Bridge, size specific, 143/155
Seatpost Alloy, 12mm offset, 2-bolt clamp, 30.9mm
Grips Specialized MTB Grip, lock-on
Front Brake Tektro Aries, mechanical disc, 203/180mm
Rear Brake Tektro Aries, mechanical disc, 180/160mm
Shift Levers Shimano Deore, 10-speed
Rear Derailleur Shimano Deore, Shadow Plus, GS cage, 10-speed
Cassette SunRace, 11-42t, 10-speed
Crankset Stout Pro, direct-mount
Chainrings 28T
Bottom Bracket BSA, threaded
Chain KMC X10, 10-speed w/ reusable Missing Link™
Rims Stout XC 80, 26", alloy, 76mm internal width, disc-specific, tubeless ready
Front Hub Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x150mm, 32h
Rear Hub Stout Pro 197, sealed cartridge bearings, 6-bolt disc, 12x197mm, 32h
Spokes Stainless, 14g
Front Tire Ground Control Fat, 60 TPI, wire bead, 26x4.6"
Rear Tire Ground Control Fat, 60 TPI, wire bead, 26x4.6"
Inner Tubes Presta, 40mm valve
Gloss Cast Battleship/Hyper/Clean $1,500
Gloss Taupe/Black/Clean $1,500


Stack 602mm 602mm 617mm 632mm
Reach 395mm 420mm 437mm 458mm
Head Tube Length 94mm 94mm 110mm 125mm
Head Tube Angle 71° 71° 71° 71°
BB Height 316mm 316mm 316mm 316mm
BB Drop 60mm 60mm 60mm 60mm
Trail 83mm 83mm 83mm 83mm
Fork Length, Full 496mm 496mm 496mm 496mm
Fork Rake/Offset 47mm 47mm 47mm 47mm
Front Center 640mm 665mm 687mm 713mm
Chainstay Length 455mm 455mm 455mm 455mm
Wheelbase 1088mm 1113mm 1135mm 1161mm
Top Tube Length, Horizontal 579mm 604mm 626mm 651mm
Bike Standover Height, Actual 765mm 786mm 813mm 847mm
Seat Tube Length 394mm 434mm 470mm 520mm
Seat Tube Angle 73mm 73mm 73mm 73mm
Crank Length 170MM 175MM 175MM 175MM
Handlebar Width 750MM 750MM 750MM 750MM
Stem Length 60MM 60MM 70MM 70MM
Saddle Width 155mm 143mm 143mm 143mm
Seatpost Length 350MM 350MM 400MM 400MM