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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.
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.
When it comes to fitness training and peak performance, nothing is more detrimental to flying fast than carrying more weight than you need to. Which is why every Allegro is built with lightweight triple butted 6061 aluminum tubing. In fact, our aluminum Allegro frames shed 14 ounces over their steel Coda counterparts. We design comfort into the naturally stiffer ride by specifying large volume 32c tires, using similar geometry as our Codas and then adding a few millimeters to the wheelbase length for just a tad more compliance.
Every Allegro 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 and will soon most assuredly be popular in the USA. A simple turn of the key immobilizes the rear wheel and prevents someone from riding off with your bike.
Going elbow-to-door-handle in traffic with cars requires a reliable brakes. The Allegro Comp delivers with Tektro’s HD-M276 hydraulic disc brakes and the Sport with cable actuated Novela, which offer more power, better modulation & feel in rain or shine. Allegro Sport offer linear pull brakes, which are plenty powerful rain or shine. To make sure you’re in complete control even when grabbing a lot of lever for a surprise stop, we include power modulators on the front brake. This modulator absorbs excess lever pressure, assuring controlled braking performance
FSA’s compact crankset concept is revolutionary: a 34T inner chainring offers a 15% lower gear ratio than traditional 39T double ring’ed road cranks, but the 50T outer loses only 6% off the top end compared to a 53T traditional outer. You get the hill climbing capability of a triple, yet less weight than a standard double.
|Frame||Size Specific Design 6061 aluminum with redesigned rear triangle, disc brake mounts, internal cable routing, hydro-formed top and down tube, taper gauge “S” bend stays, replaceable derailleur hanger and fender/rack eyelets|
|Fork||Hi-Ten tapered straight blade unicrown with bulge butted steerer, low-rider carry mounts and forged dropouts with 2 fender eyelets|
|Headset||Internal cup, threaded, 1 1/8”|
|Wheels||Double wall alloy rims, 32H, alloy hubs with QR and 14g stainless steel spokes|
|Tires||Kenda Eurotrek K-197, 700 x 32c|
|Derailleurs||Shimano RD-TY500 rear and Shimano FD-TY510 top swing front|
|Shiftlevers||Shimano EZ-Fire Plus EF41 shifters, 21-speed|
|Cassette||Shimano MF-TZ500, 7-speed 14-34T|
|Crankset||Shimano FC-TY301, 48/38/28, 170mm (15-19”), 175mm (21-23”)|
|BB Set||VP sealed cartridge, 68 x 122.5mm|
|Pedals||Platform style, steel cage/resin body|
|Brakeset||Promax TX-121 linear-pull with front power modulator and Shimano levers|
|Handlebar||Jamis Riser bar, alloy 25.4 x 10˚ sweep x 40mm rise x 600mm|
|Stem||Jamis alloy hi-rise, quill type, 35˚ rise, 80mm extension, 150mm (15”), 180mm (17-23”)|
|Grips||Anatomic double density kraton|
|Seat Post||Jamis alloy micro-adjust, 27.2 x 350mm, alloy clamp with QR seatpin|
|Saddle||Jamis Touring with SL cover|
|Sizes||15”, 17”, 19”, 21”, 23”|
|Color||Gloss Black or Inferno Red|
|SIZE||TOP EFFECTIVE||HEAD ANGLE||SEAT ANGLE||CHAIN STAY||WHEEL BASE||FORK RAKE||BB DROP||HEAD TUBE||STANDOVER||STACK||REACH|
|15||21.81 / 554||72˚||73˚||16.93 / 430||40.24 / 1022||1.89 / 48||2.26 / 57.50||4.76 / 121||28.58 / 726||21.46 / 545||15.24 / 387|
|17||22.28 / 566||72˚||73˚||17.13 / 435||40.94 / 1040||1.89 / 48||2.26 / 57.50||5.79 / 147||29.80/ 757||22.40 / 569||15.43 / 392|
|19||22.72 / 577||72˚||73˚||17.13 / 435||41.42 / 1052||1.89 / 48||2.16 / 55||6.81 / 173||31.42 / 798||23.31 / 592||15.59 / 396|
|21||23.19 / 589||73˚||73˚||17.32 / 440||41.73 / 1060||1.89 / 48||2.16 / 55||7.68 / 195||32.91 / 836||24.25 / 616||15.79 / 401|
|23||23.66 / 601||73˚||73˚||17.32 / 440||42.16 / 1071||1.89 / 48||2.16 / 55||8.62 / 219||34.13 / 867||25.16 / 639||25.40 / 406|
FIT & SIZING
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