Fatback Skookum FLT GX1 / Mastadon Pro



Check out the Skookum from Fatback Bikes, the do it all mountain bike! The Skookum features ultra short chainstays of 431mm to tuck up to a full 4.8″ tire on 100mm as close to the BB as possible. This makes for super handling in tight and twisty trails or tricky descents. Built in full carbon construction and featuring a tapered inset headset, the Skookum is stiff and light and ready to take on any trail in any season. The Sram GX1 build features the Sram GX1 1×11 drivetrain, New superlight DT Swiss Wheelset, big Schwalbe Jumbo Jim 4.8″ rubber and now has the top performing Manitou Mastadon Pro 120mm fork!

Ordering your 2018 Fatback with Fat Bikes Canada

We are now taking orders for deliveries of the New 2018 Skookum FLT with first orders arriving in mid October. At Fat Bikes Canada your Skookum can be ordered with a wide selection of tires including the new 45NRTH Wrathchild 4.6 Studded. Bike orders can be built in store for pick up, personally delivered to you in Ontario, or shipped to you be built by a shop near you. Call for details 866-646.0492

We Guarantee the best price, service and advice on your Fat Bike purchases across the Great White North!


  • SRAM GX1 Eagle 1×12- $5699
  • Shimano SLX 1×11- $5299
  • Shimano XT 1×11- $5999

Ed the Moose (on the phones at 844-464-BIKE)


We would love to say we designed the Skookum to be our “Quiver Killer”, but what fun would that be? We really designed it to be N+1, with the hopes that it will be the bike you pull off the rack first. We took the things we love best about our favorite mountain bikes; agility, speed and sexy lines, and combined those with the amazing capabilities of a 26″ X 4.8″ tire; traction, stability, flotation, and comfort.

With all of our desires written on sticky notes (exhausting our supply of sticky notes), the Skookum was born. Designed around a 120mm travel fork and internally routed dropper post, it has an integrated down tube and chain stay protectors, a 197mm through axle, and clearance for narrow Q Factor cranks (for a fat bike). Now it’s just time to dream about the parts we going to use to build it up.

  • Chinook color – White/Black / Red
  • Tapered Head Tube
  • Optimized for 1X drive trains
  • 31.6mm Seatpost Internal dropper post routing
  • Clearance for 4.8″ tires on 100mm rims
  • Accommodates 27.5+ and 29+ tires
  • Integrated down tube and Chain stay adaptors

Frame Diagram
A. Effective Top Tube 23.25 24 24.75
B. Seat Tube Length 15.5 17.5 19
C. Head Tube Length 4.1″ 4.3 4.9″
D. Chain Stay Length 17.3 17.3 17.3
Head Tube Angle 68.5 68.5 68.5
Seat Tube Angle 73 73 73
BB drop 2.2″ 2.2″ 2.2″




16", 18", 20"


Skookum FLT Carbon, Tapered HT, BB100, 4.8" Tire clearance, 197x12mm TA


Manitou Mastadon Pro 120mm, 15x150mm Axle


SRAM GX1 11spd Shifter, GX1 11spd RD, Race Face Turbine Cinch 30T Crankset, Raceface PF30 100mm BB, SRAM XG1150 10-42 Cassette, SRAM PCX1 Chain


Fatback TG1 Carbon 740mm Handlebar, Fatback TS1 Stem, Fatback TS1 Carbon Seatpost, Fatback 4Season Saddle, ESI Grips


DT Swiss 85mm Rims with CNC cut outs, Fatback 150mm Front Hub with 15mm TA, Fatback 197mm TA Rear Hub, 1.8mm 15 gauge Black Spokes


Schwalbe Jumbo Jim 26x 4.8" 127 tpi Snakeskin/Pacestar, Ultralight Tubes, Rim Strips


SRAM Guide R Hydraulic Brakes, 180/160mm Centerline Rotors


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