Nitro Stout Pro 27.5 Fat Bike

Nitro Stout Pro 27.5 Fat Bike

Regular price $3,800.00 $3,400.00 Sale

The 2018 Nitro Stout Pro is a New Kind of Fast.

The 2018 Growler Nitro Stout has a new brew.  The 2018 Growler Nitro Stout adds 27.5x4" tire options, FSA Dropper Post Option, and a new two position rear dropout.  

New for 2018:

27.5x4" Wheelset option - The 27.5 Fat wheelset option give the Growler Nitro Stout superior rollover capabilities.  Equal to a 29+ but with the tread contact of a fat bike this turns an already amazing trail bike into an absolute monster on the trail.  Faster and more nimble.  

FSA Internal Dropper Option - In addition to already installed internal dropper cable routing the 2018 adds the FSA internal dropper post.  

The new two position rear dropout allows for an easier transition to 27.5+ wheelsets.  The new two position rear dropout also has shortens the chainstays to increase how nimble the Nitro Stout can be.  Racer's get ready.   


Growler Nitro Stout Carbon Fiber Fat Bike is one of the lightest and most capable fat bikes in the world. Together with available hand built carbon rims combined with  top components from SRAM, Wren, Magura, Sunringle, Dirt Components, Raceface, Lizard Skins and FSA, the Growler Nitro Stout is nothing less then a race worthy dirt machine.

Winning Races is not all it is capable of.  The versatile to be multiple bikes using the Growler Modular Bike Building System the Growler Nitro Stout can transform from a Race Worthy Fatty to a Race Worthy 27.5+ or 29+ trail slayer using interchangeable wheelsets and the two position dropout the Growler Nitro Stout adds a shorter chainstay that increases agility and improves responsiveness making attacking all four season as simple as swapping your wheelsets.  


  • Frame: Growler Nitro Stout
  • Fork: RockShox Bluto 100mm suspension fork
  • Headset: FSA Orbit integrated 1.125 - 1.5in 
  • Stem: Wren alloy with 31.8 Clamp 
  • Handlebar: Wren 740mm UD Carbon Fiber 1/2” rise/31.8 
  • Brakes: Magura MT5 4 Piston Hydraulic Brakes with 180mm Rotors front and rear  
  • Rear derailleur: SRAM GX Eagle 1x12, long cage 
  • Shift levers: SRAM GX Eagle trigger shifters
  • Cassette: SRAM, GX Eagle 12-speed, 10-50t 
  • Chain: SRAM Eagle 12 speed chain 
  • Crankset: Raceface Turbine Fat Bike Crank, 190mm spindle with 32T Chain Ring 
  • Rims: Sunringle Mulefut SL80 Tubeless installed  
  • Front Hub: Sunringle SRC 15x150mm hub
  • Rear Hub: Sunringle SRC 12x197mm hub 
  • Front tire: Terrene Cake Eaters, 120TPI, folding bead, 27.5x4" Studdable
  • Rear tire: Terrene Cake Eaters, 120TPI, folding bead, 27.5x4" Studdable
  • Saddle: WTB Volt Comp saddle 
  • Grips: Growler/LizardSkin Locking Grips 
  • Seatpost: FSA Dropper Seatpost optional

Growler Nitro Stout Geometry

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