Jamis: Roughneck - 2020

Jamis: Roughneck - 2020

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Jamis: Roughneck - 2020

Jamis' Roughneck is a mountain bike with 26x4.5” fat tires that can float over snow, sand, and soft mud with ease. This MTB also features water bottle, cargo, and rack mounts for loading up on any expedition.



The fork and frame tubes on the Roughneck are made by SPF Air Forming. SPF is carried out at high air temperatures, where the tube structure is in its most ‘plastic’ and formable state. This allows more complicated shapes to be produced that cannot be made using traditional forming techniques.  For the fork, air forming produced a one-piece lower leg and crown eliminating the need for welding at this common joint. The result: more optimized shapes and less weight.


The 12x197mm rear hub and 100mm wide bottom bracket shell combination provide clearance for a double chainring set-up and up to a 4.5” rear tire. The Roughneck’s air formed fork and 15x150mm front hub provide clearance for up to a 5” front tire.


Securing the rear wheel to the frame by threading a 12mm axle into the rear drop-outs is not only safer, it’s stiffer.  The rear wheel tracks directly in line with the frame, for more precise handling, so you can go faster with more confidence. The increase in stiffness of a 15mm fork axle improves steering & handling significantly. The hub drop outs provide a self centering feature for the wheel for fast, easy installation.


The Roughneck’s frame features rear rack eyelets and enough cargo/water cage mounts for the option to load up all the gear you may possibly need out there. Internal cable housing allows for uninterrupted shifting performance when using a frame bag.


Benefits of a tubeless set-up are reduced rotating weight and the ability to use lower inflation pressures for greater traction without the risk of pinch flats.


Riding with control requires steering precision, which starts with the front of the bike. Stiffening this area results in less wheel deflection, more wheel control. A tapered 1 1 /8” to 1 1 /2” head tube and steerer serves up a significant increase in rough terrain tracking and stability without much of a weight penalty compared to standard 1 1 /8” systems since the steer tube wall thickness can be reduced. Adding a 15mm QR thru-axle hub/fork interface takes steering precision over the top.




Triple-butted 6061 air-formed aluminum, 1.5 - 1 1/8” tapered head tube, 12x197mm rear hub spacing, post mount disc brakes, 100mm bottom bracket shell, rack mounts, internal cable routing, dropper seat post routing, replaceable derailleur hanger


Triple-butted 6061 air-formed aluminum, suspension corrected, tapered steerer, 15x150mm hub spacing, post-mount disc, rack/bottle mounts


FSA Orbit 1.5 Zero-Stack internal cup, 8mm cone spacer


Sun Ringle MuleFut 80 SL, STR Tubeless Ready, 15x150 Front hub, 12x197 Rear hub, Wheelsmith spokes, Brass nipples


Vee Tire Co Snow Shoe, 26 x 4.5", Tubeless


Shimano SLX Shadow Plus rear

Shift levers

Shimano SLX, 1x11-speed


KMC X11 EPT (Anti-Rust), 11-speed


Shimano M7000, 11-speed, 11-46T


Race Face Ride, 30T

BB Set

Race Face External


MTB alloy platform


TRP Spyke 2-piston Mechanical, 180mm front & 160mm rear 6-bolt rotors


Race Face Ride, 31.8 x 740mm


Race Face Ride, 70mm (15"/17"), 80mm (19"/21")


Jamis Lock-On

Seat Post

Race Face Ride, 31.6 x 400mm


WTB Volt


15”, 17”, 19”, 21”


Olive Drab


33.00 lbs



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