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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.
TOP FIVE THINGS YOU NEED TO KNOW
Our lightweight & durable aluminum XR.24 frame is easier to pedal than steel. And it's spec'd with a replaceable rear derailleur hanger for increased frame longevity.
That rigid fork isn't just for cool looks. It's lightweight means greater control & safety for young riders.
Compared to bigger 26” wheeled bikes, the smaller diameter 24” wheels and shorter 12” frame of the XR.24 provides more standover clearance and a lower center of gravity for enhanced control & safety, so young aspiring mountain bikers can learn to ride both on and off road comfortably, securely and safely.
The double chainring crankset offers increased gear range (14-speeds) with an alloy outer rock guard to protect the chainrings from contact with curbs or logs. Helps keep pants and legs clean too!
We've spec'd nut type, non-quick release hubs and seat post clamps, so that wheels and seats remain securely and safely attached to the frame and fork.
|Frame||Enduro frame design, 6061 aluminum tubes, tapered/ovalized top tube, down tube & stays with replaceable derailleur hanger|
|Fork||Unicrown, 6061 aluminum, 28.6 Cr-Mo steerer|
|Wheels||Alloy 36H black anodized rims with brushed brake tracks, alloy MTB hubs with nutted axles, 14G nickel-plated spokes|
|Tires||CST MTB, 24 x 1.95”|
|Derailleurs||Shimano TX300 rear|
|Shiftlevers||Shimano RevoShift 35, 7-speed|
|Freewheel||Shimano TZ21 freewheel, 14-28, 7-speed|
|Crankset||Forged alloy crank, 152mm, 32T chainring and protective outer rock-ring|
|BB Set||Cotterless type, 3P axle, 68 x 119mm (32-52-35)|
|Pedals||MTB platform, hi-impact resin|
|Brakeset||Alloy linear pull type with full alloy short reach levers|
|Handlebar||MTB alloy riser, 6˚ sweep x 20mm rise x 580mm wide|
|Stem||MTB alloy threadless, 15˚ rise x 60mm extension|
|Grips||Kraton for Grip Shift|
|Seatpost||Alloy micro-adjust, 27.2 x 300mm, with 31.8mm alloy clamp|
|Saddle||XC MTB style|
|Colors||Ano Black, Limelight, Cherryade|
|SIZE||TOP EFFECTIVE||HEAD ANGLE||SEAT ANGLE||CHAIN STAY||WHEEL BASE||FORK RAKE||BB HEIGHT||HEAD TUBE||STANDOVER|
FIT & SIZING