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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.
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.
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.
Proper fit on your bike is critical for maximum performance and comfort. That’s why we offer the patented ATS adjustable threadless steering system on the Allegro Elite and Comp 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. You can even adjust it quickly while out on a ride.
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 Elite delivers with Tektro’s HD-M285 hydraulic disc brakes and the Comp with cable actuated Novela, which offer more power, better modulation & feel in rain or shine. Allegro Sport and Allegro 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.
UPGRADES FROM ALLEGRO COMP
• Jamis full carbon fork
• Shimano Sora R3000 18-speed group
• Shimano Sora SL-R3000 shifters
• FSA Tempo crankset, 50/34T
• Tektro HD-M285 hydraulic disc brakes with 160mm rotors
UPGRADES / CHANGES FROM PREVIOUS MODEL
• Redesigned Size Specific Design frame Geometry
• Jamis full carbon fork
• Jamis Flat Bar 600mm (19-23")
|Frame||Size Specific Design Triple-butted 6061 aluminum with internal cable routing, hydro-formed top and down tube, taper gauge “S” bend stays with disc brake post mounts, replaceable derailleur hanger and fender/rack eyelets|
|Fork||Jamis full carbon composite with carbon steerer, disc brake post mounts, low-rider carrier mounts and carbon drop out with stainless steel tabs and fender eyelets|
|Headset||FSA Integrated IS threadless with nylon upper compression ring, 1 1/8”|
|Wheels||Alex TD26 double wall disc specific alloy rims, 32H, Formula 6-bolt alloy hubs with QR and 14g stainless steel spokes|
|Tires||Vittoria Randonneur with Double Shield puncture protection and reflective sidewalls, 700 x 32c|
|Derailleurs||Shimano Sora RD-R3000 GS rear and Shimano Sora FD-R3000 front|
|Shiftlevers||Shimano Sora SL-R3000 for flat-bar, 18-speed|
|Cassette||Shimano HG200 9-speed, 11-32T|
|Crankset||FSA Tempo, 50/34T, 170mm (15-17”), 175mm (19-23”)|
|BB Set||FSA sealed cartridge, 68 x 110.5mm|
|Pedals||Platform style, steel cage/resin body, toe clip attachable|
|Brakeset||Tektro HD-M285 hydraulic disc brakes with 160mm rotors and Tektro levers with reach adjust|
|Handlebar||Jamis Flat bar, 6061 T-6 aluminum, 31.8 x 10˚ sweep x 580mm (15-17”) 600mm (19-23”)|
|Stem||Jamis adjustable threadless system (ATS), forged aluminum, 10˚ x 90mm (15/17”), 105mm (19/21"), 115mm (23”). ATS shim length 100mm|
|Grips||Anatomic double density kraton|
|Seat Post||Jamis alloy micro-adjust, 27.2 x 350mm alloy clamp with QR seatpin|
|Saddle||Selle Royal S1 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||21.81 / 554||72˚||73˚||16.93 / 430||40.24 / 1022||1.89 / 48||2.26 / 57.50||4.72 / 120||28.82 / 732||21.50 / 546||15.20 / 386|
|17||22.28 / 566||72˚||73˚||16.93 / 430||40.90 / 1039||1.89 / 48||2.26 / 57.50||5.71 / 145||30.08 / 764||22.44 / 570||15.39 / 391|
|19||22.72 / 577||72˚||73˚||17.13 / 435||41.42 / 1052||1.89 / 48||2.16 / 55||6.93 / 170||31.50 / 800||23.27 / 591||15.59 / 396|
|21||23.66 / 601||73˚||73˚||17.32 / 440||41.69 / 1059||1.89 / 48||2.16 / 55||7.48 / 190||32.91 / 836||24.17 / 614||15.79 / 401|
|23||23.66 / 601||73˚||73˚||17.32 / 440||42.16 / 1071||1.89 / 48||2.16 / 55||8.46 / 215||34.17 / 868||25.12 / 638||25.40 / 406|
FIT & SIZING
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