2017 Jamis Roughneck
2017 Jamis Roughneck
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 chain ring 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.
Why Thru Axles?
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 and handling significantly. The hub drop outs provide a self centering feature for the wheel for fast, easy installation.
Ready to Load
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 the uninterrupted shifting performance when using a frame bag.
Benefits of a tubless set-up are reduced rotating weight and the ability to use lower inflation pressures for a greater traction without the risk of pinch flats.
Tapered Head Tube and Fork Steerer
Riding with control requires steering precision, which starts with the front of the bike. Stiffening this area results in less wheel defelction, 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.
Frame: 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
Fork: Triple-Butted 6061 air-formed aluminum, suspension corrected, tapered steerer, 15x150mm hub spacing, post-mount disc, rack/bottle mounts
Headset: FSA Orbit, Alloy cups
Wheels: Sun Ringle MuleFut 80 COmp, STR Tubeless ready, 15x150 Front hub, 12x197 Rear hub, Wheelsmith spokes, brass nipples
Tires: Kenda Juggernaut Sport, 26 x 4.5", 60tpi, folding
Derailleurs: Shimano Deore Shadow rear and Deore front.
Shift Lever: Shimano Deore, 2x10-speed
Chain: KMC X10 EPT Anti-Rust, 10-speed
Cassette: Shimano HG50, 10-speed, 11-36T
Crankset: FSA Comet, 36/22T, 170mm (15"), 175mm (17-21")
BB Set: FSA MegaExo
Pedals: ATB alloy platform
Brakeset: TRP Spyke 2-piston Mechanical, 180mm front and 160mm rear 6-bolt rotors
Handlebar: Rithcey Trail, 740mm x 20mm rise
Stem: Ritchey Trail, 70mm (15-17"), 90mm (19/21")
Grips: Jamis Lock-On
Seat Post: Ritchey Trail Comp, 31.6x400mm
Saddle: WTB Volt Sport