Manufacturer's Suggested Retail Price excludes shipping costs, dealer assembly/prep, taxes or import duties.
The benefits of a properly fitted bike have been recognized for years. It is essential for injury prevention and maximized efficiency. And it is the primary determinant in assuring the greatest comfort and enjoyment while riding.
Our first road bikes introduced in 1988, the Quest and Axis (for Jamis history buffs, this later became the Eclipse), were designed in consultation with Bill Farrell, inventor of the first bike-sizing tool, the Fit Kit. Back then, bike companies generally plotted a single geometry on all frame sizes: the blow ‘em up or shrink ‘em down solution – lazy, cheap and thankfully long ago obsolete. We learned from Bill early on how to tune our frame geometries and specify component sizing to account for the multiple variables needed for a proper fit for every frame size. We’ve been honing our fits for every bike, every year, ever since.
But fit is a two-dimensional calculation. Stack and reach. How tall, how long, for me? It’s in the third dimension – the SST dimension-- that Jamis continues to make a difference for you.
Slight changes in tube diameter have a significant impact upon performance. As diameter increases, strength and stiffness increase along the length of the tube as well. Whether in aluminum, steel or carbon fiber, we vary the cross-section and sometimes even wall thicknesses to fine-tune the performance and comfort characteristics of each frame size.
SST -- Size Specific Tubing-- optimizes ride quality and assures the lightest possible weight for each frame size. By varying the diameters of the tubing in the main frames of each of our frame sizes (and sometimes even in the seatstays) by 10 – 20%, we can produce a bike that not only fits like a glove and handles precisely, but accelerates and climbs explosively and offers justright compliance for every rider, every frame size.
Proper fit on a bike is critical for maximum performance and comfort. Which is why micro-adjustment of fore/aft saddle position as well as seat post/saddle height has been around for years. But this hasn’t been the case for threadless steering systems. Lifting or lowering steering height has always required removal of the stem to allow for the addition or removal of spacers. This is neither a simple, nor a “micro” adjustment procedure.
The patented ATS (Adjustable Threadless System) technology resolves this by replacing the standard stem/spacer system with a slotted and ribbed shim that compresses and preloads the headset. With the headset preloaded by this shim instead of a stem, the stem can be mounted anywhere along the ATS shim. Stem height can now be quickly adjusted to within a millimeter by simply loosening one bolt without ever loosening the headset!
With saddle position and stem height fine-tuned to your optimal position, riding will be more efficient, more comfortable and more enjoyable.
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 drivetrains on our DXT bikes feature long cage ATB rear derailleurs, full-size triple chainring cranksets and big 11-34 or 32T cassette blocks. This gives you the dual advantage of having high road bike gearing for controlled pedaling at speed on descents and low mountain bike gearing for easier pedaling uphill.
Every DXT offers a full complement of eyelets and rack mounts to simplify installation of carriers and fenders. We even include bosses on the underside of the seatstays for installation of a ring lock. Ring locks are tremendously popular in Europe. A simple turn of the key immobilizes the rear wheel and prevents someone from riding off with your bike.
Proper fit on your bike is critical for maximum performance and comfort. That’s why we offer the ATS patented adjustable threadless steering system on the DXT Elite models. Whether you want to fine tune your ride and establish the perfect fit, or change it regularly to suit different terrain, with this stem, adjusting your handlebar height is as easy as adjusting your seat post height.
The advantage of a suspension fork should be intuitively clear: hit a bump and absorb it. Hit a bump and stay in control of your bike. But suspension isn’t always desirable. When riding on smooth pavement or climbing, pedaling energy and power can be absorbed and dissipated by the movement (bobbing) of the fork. Enter lockout. With a flip of a knob on the top of the fork, the fork’s travel can be locked from movement, allowing the bike to be 100% responsive to pedaling input .
The advantages of disc brakes over rim brakes on a versatile bike like the DXT far exceed their sole disadvantage, weight gain. Besides their incredible power and modulation, they’re just plain safer, especially in the rain. Once rims get wet or muddy, using friction to stop the wheel at its circumference is less efficient than using friction to stop a less wet or muddy small diameter disc near the center of the wheel from rotating. And eliminating the rim from braking surface duties results in a longer lasting wheel
Fully integrated shifting systems offer the most precise and reliable performance. That’s why every DXT offers Shimano shifters, Shimano front and rear derailleurs, Shimano cranksets and Shimano cassettes.
The advantage of large diameter wheels is getting a lot of press these days with all the noise and news about 29’er mountain bikes. We like to think that the DXT is one of the original 29’ers. With big 700c hoops (same as a 29’er) that roll over bumps & holes better than smaller diameter 26” or 27.5” wheels, and with a bigger contact patch for greater traction and control. But in the case of the DXT, with a smaller 40c width & smoother tread that significantly reduces rolling resistance over fatter, knobbier mountain bike tires for faster sailing on streets and paths.
UPGRADES FROM DXT SPORT
Shimano FC-M311 crankset
Shimano RapidFire SL-M310 shifters and Tektro Levers
Shimano Altus RD-M310 SGS and FD-M191 derailleurs
Tektro HD-M285 hydraulic disc brakes
Selle Royal Seta M1 saddle
UPGRADES / CHANGES FROM 2016
Tektro HD-M285 hydraulic disc brakes
Shimano HG41 8-speed, 11-32T cassette
|Frame||Triple-butted 6061 aluminum with hydro-formed top and down tube, 1 1/8” head tube, new designed taper gauge “S” bend stays, seat stays and disc brake mounts, 34.9mm seat tube, replaceable derailleur hanger and fender/rack eyelets|
|Fork||SR/Suntour SF15-NVX HLO, aluminum lowers, coil spring, 28mm stanchions, 1-1/8" steerer, aluminum crown, hydraulic lock out, 75mm travel|
|Headset||Internal cup, 1 1/8”|
|Wheels||Alex DC26 disc specific double wall alloy rims, 32H, Formula disc hubs and 14g stainless steel spokes|
|Tires||Ritchey Comp Speedmax Cross, 700 x 40c|
|Derailleurs||Shimano Altus RD-M310 SGS rear and FD-TY710 bottom pull front|
|Shiftlevers||Shimano RapidFire SL-M310, 24-speed|
|Cassette||Shimano HG41 8-speed, 11-32T|
|Crankset||Shimano FC-M311, 48/38/28T, 170mm (15-17”), 175mm (19-23”)|
|BB Set||FSA sealed cartridge, 68 x 110.5mm|
|Pedals||Full alloy platform, toe clip attachable|
|Brakeset||Tektro HD-M285 post mount hydraulic disc brakes with 160mm 6-bolt rotors and Tektro levers|
|Handlebar||Jamis Riser bar, 6061 double-butted aluminum, 31.8 x 20mm rise x 10˚ sweep x 600mm|
|Stem||Jamis Trekking, 3D forged alloy, 35˚ rise, 80mm (15-17”), 100mm (19/21/23")|
|Grips||Anatomic double density kraton grip with gel|
|Seat Post||Jamis alloy micro-adjust, 31.6 x 350mm alloy clamp with QR seatpin|
|Saddle||Selle Royal Seta M1 with integrated clip system|
|Sizes||15”, 17”, 19”, 21”, 23"|
|SIZE||TOP EFFECTIVE||HEAD ANGLE||SEAT ANGLE||CHAIN STAY||WHEEL BASE||FORK RAKE||BB DROP||HEAD TUBE||STANDOVER||STACK||REACH|
|15||23.03 / 585||71˚||73˚||17.52 / 445||42.16 / 1071||1.65 / 42||2.36 / 60||4.13 / 105||28.94 / 735||22.68 / 576||16.06 / 408|
|17||23.62 / 600||71˚||73˚||17.52 / 445||42.75 / 1086||1.65 / 42||2.36 / 60||4.72 / 120||30.24 / 768||23.23 / 590||16.46 / 418|
|19||24.01 / 610||71˚||73˚||17.52 / 445||43.19 / 1097||1.65 / 42||2.36 / 60||5.31 / 135||31.34 / 796||23.78 / 604||16.69 / 424|
|21||24.61 / 625||71˚||73˚||17.52 / 445||43.78 / 1112||1.65 / 42||2.36 / 60||6.10 / 155||32.68 / 830||24.53 / 623||17.05 / 433|
|23||24.80 / 630||71˚||73˚||17.52 / 445||44.01 / 1118||1.65 / 42||2.36 / 60||6.89 / 175||34.05 / 865||21.34 / 542||17.01 / 432|
FIT & SIZING
VIEW LAST YEAR'S MODEL >