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All our frames and forks are tested continually to meet or exceed (in some cases, well exceed) EN standards 14764, 14765, 14766 and 14781 as well as the new ISO 4210 standards. We conduct these tests at our frame manufacturing facilities, but we also use EN accredited testing laboratories such as Intertek and SGS to verify the results of our own tests. If these tests aren’t telling us everything we want to know about our bikes, we increase the loads and cycles, or we determine another way to test. Where current hydraulic testing machines, jigs and hardware aren’t up to the task of emulating some of the forces and impacts our bikes might be subject to, we’ve designed our own.
We relentlessly cycle test for fatigue from pedaling and torsional forces on every single frame size, with deflection tests for stiffness at every point of the frame. Brutal impact tests with massive weights dropped on fixed frames or forks are performed. Then reversed, with weights attached to the frame, the frame hoisted to a given height depending upon product type, then released.
This destructive testing is enormously instructive and important. And it is in continual process. But it’s our ongoing non-destructive testing of frames and forks fresh off the factory floor that’s just as vital.
For our carbon fiber frames, EVERY frame is weighed to make sure it’s neither resin rich nor resin deficient. We also measure the stiffness of each frame in 6 critical areas as a check on lay-up production. Each deflection test must fall within 5% of the standards our machine and field-testing have established. This weighing and stiffness deflection testing guarantees every single frame we produce meets all Jamis manufacturing protocol and will
deliver the ride qualities we defined and demand.
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.
|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", 60 tpi, folding|
|Derailleurs||Shimano Deore Shadow rear and Deore front|
|Shift levers||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 & 160mm rear 6-bolt rotors|
|Handlebar||Ritchey Trail, 740mm x 20mm rise|
|Stem||Ritchey Trail, 70mm (15"/17"), 90mm (19"/21")|
|Seat Post||Ritchey Trail Comp, 31.6 x 400mm|
|Saddle||WTB Volt Sport|
|Sizes||15”, 17”, 19”, 21”|
|SIZE||TOP EFFECTIVE||HEAD ANGLE||SEAT ANGLE||CHAIN STAY||WHEEL BASE||BB DROP||HEAD TUBE||STANDOVER||STACK||REACH|
First Look – 2017 Jamis Roughneck
"In a nut shell- stable, up to date geometry shaped into a very aesthetic “air formed” aluminum frame and fork- strong, light and very easy on the eye’s.
FIT & SIZING
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