2018 Fatback Skookum 18" fatbike frame (carbon fiber)

FitmanNJ

Well-Known Member
Being built out of carbon fiber, this weighs less than many other fat frames out there. This is an 18" medium, but, for sizing, I'd say it's on the larger end of medium -- or, maybe I'm just shrinking.:) I decided to part with it as I wanted to downsize to a smaller framed fatbike. The frame has some of the expected scratches from having been used on some rocky trails for 3-4 years. There is a place just above the bottom bracket where some tools I regularly carried in a seat tube bag caused a ~1/4" round chip in the paint. I showed this to Jim Vreeland for his opinion, and he deemed the frame still structurally sound, recommending that I fill this paint hole with clear nail polish, which I've done (photo below).

This is a snappy-handling bike with relatively short 440 mm chainstays and a 68.5 degree head angle. I had no problem fitting a Surly Lou tire on a 100mm rim out back, so it has adequate winter tire clearance (not for a Snowshoe 2XL or Terrene Johnny5, however). It's spec'd for a 120mm Manitou Mastodon fork.

I'm including a rear thru-axle, seatpost clamp, Raceface Bottom Bracket (has some miles still left on it), headset bearings/hardware, and a derailleur hanger. You can see trials rider Pat Smage put a Skookum through its paces in many of his recent YouTube videos. I used the bike year-around, but with winter approaching, this could be a good way to get into some dedicated snow riding.

The frame alone used to cost well over $2K, but I see that the newest Skookum frames (now being sold by Corvus) are currently on-sale for $1500. Let's cut this in half and go for $750 for my frame. Feel free to reach out with any questions!

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Let's try this again. The description (above) hasn't changed since last year. The current Skookum frames from Corvus sell for $1450, but I see that they're now made of aluminum. I'll lower the price, again, too, to $700. Offers a light and snappy ride (for a fatbike). Please reach out with any questions.
 
This bike was often marketed as a "four season" fatbike due to its light weight, short chainstays, and resulting quick-ish maneuverability.
 
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@serviceguy. is this larger than my frame ;)

Seriously, i don't know !!!!

I have enough stuff around to have two fatbikes!​
Dunno, but you can check yourself...the Skookum look a little bit larger and better...

2018 Framed Alaskan Carbon

2018 Fatback Skookum
2018 Fatback Skookun Carbon​
2018 Framed Alaskan Carbon​
Geometry​
Geometry​
16"​
18"​
20"​
15​
17​
19​
Stack​
626mm​
631mm​
644mm​
616.7mm​
635.4mm​
649.4mm​
Reach​
401mm​
417mm​
433mm​
381mm​
406mm​
432mm​
Stack to Reach Ratio​
1.56:1​
1.51:1​
1.49:1​
1.62:1​
1.56:1​
1.5:1​
Seat Tube Length, C-T​
394mm​
445mm​
483mm​
381mm​
432mm​
483mm​
Top Tube Length, Effective/Horizontal HT Top​
592mm​
610mm​
630mm​
585mm​
604mm​
620mm​
Top Tube Slope​
25.8deg​
20.6deg​
17.6deg​
Head Tube Angle​
68deg​
68deg​
68deg​
69.5deg​
69.5deg​
69.5deg​
Seat Tube Angle​
73deg​
73deg​
73deg​
73deg​
73deg​
73deg​
Head Tube Length​
105mm​
110mm​
125mm​
105mm​
125mm​
140mm​
Bottom Bracket Drop​
55mm​
55mm​
55mm​
63mm​
63mm​
63mm​
Bottom Bracket Height​
324.5mm​
324.5mm​
324.5mm​
316.5mm​
316.5mm​
316.5mm​
Chainstay Length​
440mm​
440mm​
440mm​
468mm​
468mm​
468mm​
Chainstay Length Horizontal​
436.6mm​
436.6mm​
436.6mm​
463.7mm​
463.7mm​
463.7mm​
Front-Center​
682.7mm​
700.6mm​
721.6mm​
653.3mm​
674.2mm​
690.1mm​
Front-Center Horizontal​
680.5mm​
698.5mm​
719.5mm​
650.3mm​
671.3mm​
687.3mm​
Wheelbase​
1117mm​
1135mm​
1156mm​
1114mm​
1135mm​
1151mm​
Fork Offset/Rake​
45.2mm​
45.2mm​
45mm​
45mm​
45mm​
45mm​
Fork Length (Axle-To-Crown)​
485mm​
485mm​
485mm​
Trail​
104.6mm​
104.6mm​
104.9mm​
93.9mm​
93.9mm​
93.9mm​
very high​
very high​
very high​
very high​
very high​
very high​
Mechanical Trail​
97mm​
97mm​
97.2mm​
87.9mm​
87.9mm​
87.9mm​
Wheel Flop​
36.3mm​
36.3mm​
36.4mm​
30.8mm​
30.8mm​
30.8mm​
Standover Height​
742mm​
763mm​
782mm​
711.2mm​
743mm​
774.7mm​
Tire to Pedal Spindle​
133.2mm​
151.1mm​
172.1mm​
103.8mm​
124.7mm​
140.6mm​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
Pedal Spindle to Ground Clearance​
154.5mm​
154.5mm​
154.5mm​
146.5mm​
146.5mm​
146.5mm​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
 
Dunno, but you can check yourself...the Skookum look a little bit larger and better...

2018 Framed Alaskan Carbon

2018 Fatback Skookum
2018 Fatback Skookun Carbon​
2018 Framed Alaskan Carbon​
Geometry​
Geometry​
16"​
18"​
20"​
15​
17​
19​
Stack​
626mm​
631mm​
644mm​
616.7mm​
635.4mm​
649.4mm​
Reach​
401mm​
417mm​
433mm​
381mm​
406mm​
432mm​
Stack to Reach Ratio​
1.56:1​
1.51:1​
1.49:1​
1.62:1​
1.56:1​
1.5:1​
Seat Tube Length, C-T​
394mm​
445mm​
483mm​
381mm​
432mm​
483mm​
Top Tube Length, Effective/Horizontal HT Top​
592mm​
610mm​
630mm​
585mm​
604mm​
620mm​
Top Tube Slope​
25.8deg​
20.6deg​
17.6deg​
Head Tube Angle​
68deg​
68deg​
68deg​
69.5deg​
69.5deg​
69.5deg​
Seat Tube Angle​
73deg​
73deg​
73deg​
73deg​
73deg​
73deg​
Head Tube Length​
105mm​
110mm​
125mm​
105mm​
125mm​
140mm​
Bottom Bracket Drop​
55mm​
55mm​
55mm​
63mm​
63mm​
63mm​
Bottom Bracket Height​
324.5mm​
324.5mm​
324.5mm​
316.5mm​
316.5mm​
316.5mm​
Chainstay Length​
440mm​
440mm​
440mm​
468mm​
468mm​
468mm​
Chainstay Length Horizontal​
436.6mm​
436.6mm​
436.6mm​
463.7mm​
463.7mm​
463.7mm​
Front-Center​
682.7mm​
700.6mm​
721.6mm​
653.3mm​
674.2mm​
690.1mm​
Front-Center Horizontal​
680.5mm​
698.5mm​
719.5mm​
650.3mm​
671.3mm​
687.3mm​
Wheelbase​
1117mm​
1135mm​
1156mm​
1114mm​
1135mm​
1151mm​
Fork Offset/Rake​
45.2mm​
45.2mm​
45mm​
45mm​
45mm​
45mm​
Fork Length (Axle-To-Crown)​
485mm​
485mm​
485mm​
Trail​
104.6mm​
104.6mm​
104.9mm​
93.9mm​
93.9mm​
93.9mm​
very high​
very high​
very high​
very high​
very high​
very high​
Mechanical Trail​
97mm​
97mm​
97.2mm​
87.9mm​
87.9mm​
87.9mm​
Wheel Flop​
36.3mm​
36.3mm​
36.4mm​
30.8mm​
30.8mm​
30.8mm​
Standover Height​
742mm​
763mm​
782mm​
711.2mm​
743mm​
774.7mm​
Tire to Pedal Spindle​
133.2mm​
151.1mm​
172.1mm​
103.8mm​
124.7mm​
140.6mm​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
Pedal Spindle to Ground Clearance​
154.5mm​
154.5mm​
154.5mm​
146.5mm​
146.5mm​
146.5mm​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
170 mm cranks​
That's a lot of data on these bikes, Leo. I didn't have half of this info when I bought the Skookum originally. Cool website!
 
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