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The Icon is not just a lighter, faster version of our Venturas. When we put this project on the design board, we knew we didn’t just want to make a bike that could make a difference. We also wanted to MAKE it differently. Which is what Synthesis is all about: small batch manufacturing. A process that understands a great riding experience begins with a great building experience, one frame at a time.
The ICON series frame was modeled after the Xenith Team. Think Xenith Team in butted aluminum instead of carbon fiber and you have the idea. We attempted to replicate EVERY attribute of the Team in the Icon and tested numerous protos on both our machines and the road repeatedly to get it right. From the precise and snappy handling in turns, to the out-of-saddle explosiveness in sprints, to the solid descent manners that inspire high-speed confidence. Combining the proven race-winning geometry of the Xenith with the durability and affordability of aluminum makes this an ideal CRIT bike, capable of delivering as much acceleration as you can provide the kick for.
Our goal was to build an aluminum racing frame that weighed no more raw than our Omniad T700 carbon fiber Xenith Pro and Race frames, also raw. That meant a target of 1150 grams for a 56cm frame. We’re proud to print (and we’re big on being accurate about our weight proclamations) that we’ve produced multiple 56cm prototypes and all have weighed within 0.1% of 1150 grams. So scrap the thought that you have to buy carbon fiber to get a bike that’s light enough to race. The beauty of the Icon frame is that it’s light, stiff, durable AND costs much less to manufacture than a carbon fiber frame. So the Icon parts package can be considerably up-spec’ed over a comparably priced carbon fiber bike, ensuring that the Icon will ALWAYS be lighter.
Before electronic shifting was a commercial reality, we were torn on the benefits of internal cable routing. The advantages – stunningly clean aesthetics, no cable stops to chip, ostensibly cleaner cabling systems – were counter-balanced by its chief disadvantages – the extra weight and friction of full-length housing or interior guide tubes and the labor-intensive challenges of installation and replacement. Given our engineering emphasis on performance-first design, we previously outfitted our road-racing Xeniths with externally routed gear and brake cabling. It was light. It was simple. It was easy to maintain.
But with electronic shifting, it makes much more sense to run everything inside. Attaching and affixing wiring and harnesses externally is every bit as laborious (think cable ties, adhesives and external mounts) as running them internally, where they are much more protected as well. Not to mention, running this stuff inside just looks right.
Which is why every 2014 Xenith is equipped with our new Adaptive Cable Entry system. ACE allows our frames to elegantly and easily manage the internal routing of brake and derailleur cable housing OR electronic Di2 wiring. Xenith models specified with standard cable-actuated drivetrains will be outfitted with ACE plates with integrated cable stops. But we also include with every bike an extra set of ACE plates for Di2 wiring should you ever wish to make the jump to electronic shifting.
Last year, we made the switch to USA made Enduro Bearings in the bottom brackets on many of our high-performance level models. Why? Because they are the experts when it comes to obsessing about bearings! Enduro Bearings pioneered MAX type bearings, a design previously only used for large equipment such as forklifts and earth movers almost 20 years ago for bicycles to address the challenges associated with mountain bike pivots.
By filling the races with balls, these bearings have 35-40% more load capacity than standard radial bearings. They accomplish this with a special design where the maximum number of balls are inserted into the bearing. The race grooves are deeper on these bearings for more lateral support for the twisting and multiple forces associated with mountain bike pivots. LLU seals give maximum protection against the elements while keeping the 90% fill of Almagard Extra High Pressure Grease inside. We also specify MAX BLACK OXIDE bearings in our carbon frames which get an additional Magnetite treatment for hardness, rust resistance and even more reliability.
In addition to these BB bearings, we’ve also gone ahead and made these bearings standard on our MP4 suspension bikes. The result for you is a much more active and quick rear suspension, eliminating play and wag all at the same time. Out of the box, our DEFCON & XCT suspension bikes with Enduro’s MAX bearings will save you time and money, as they will perform well 2 or 3 times longer than off the shelf bearings.
There are a number of BB standards in the bike industry right now. Here is what you will find on our bikes, and why.
Traditional: The BSA standard. The standard forever. A steel BB spindle, 17mm in diameter, turns within a 68mm or 73 mm shell and upon sealed cartridge ball bearings that are threaded into the BB shell. Not particularly light, not especially stiff (by today’s standards), but reliably durable and definitely cost effective.
External Bearing: The BB shell is still 68mm or 73mm wide and just under 35mm in diameter, but the bearings have been moved outside the BB shell (Shimano Hollowtech II, SRAM GXP, FSA MegaExo). This allows the spindle diameter to be increased over 40% to 24mm and hollowed for a huge stiffness increase with a significant weight reduction. The larger diameter spindle does not compromise bearing size because all bearings now reside outside the frame. The spindle is also better supported with bearings nearer its ends rather than its center.
PressFit30: PressFit30 (SRAM) is a derivative of the BB30 (FSA) system. BB30 increases the spindle diameter to a whopping 30mm for the ultimate in stiffness. But because the BB shell’s inside diameter is also increased from just under 34mm to 42mm, bearing size is not compromised. The challenge with BB30 is that bearings are pressed directly into the frame, leading to durability issues if there are any frame or bearing tolerance deviations. The beauty of the PF30 system is that bearings are housed in nylon cups that are pressed into the frame’s bottom bracket shell. Bottom-line advantages of the PF30 system over BB30? Improved bearing-to-shell interface, greater bearing durability and simplified installation.
BB386EVO: The BB386 EVO bottom bracket design amplifies the benefits of the proven BB30 and PF30 system. It takes the lighter, stiffer 30mm alloy spindle from the BB30 design, incorporates press-fit bearing cups from the PF30 system and marries both to a wider 86.5mm BB shell (which is the same width as on a standard 68mm shell with external bearings). All without changing Q-factor. Why a wider shell? It allows us to increase the diameter of our seat and down tubes at the BB shell a full 30%, for increased stiffness where you really need it. We can also optimize chainstay design with an increased diameter that doesn’t crowd the rear tire.
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 ICON series frame was modeled after our top-level Xenith. Think Xenith in butted aluminum instead of carbon fiber and you have the idea. We attempted to replicate EVERY attribute of the Xenith in the Icon and tested numerous protos on both our machines and the road repeatedly to get it right. From the precise and snappy handling in turns, to the out-of-saddle explosiveness in sprints, to the solid descent manners that inspire high-speed confidence. Combining the proven race-winning geometry of the Xenith with the durability and affordability of aluminum makes this an ideal CRIT bike, capable of delivering as much acceleration as you can provide the kick for.
The ICON frame features a larger 34.9mm seat tube, which allows us to spec an over-sized 31.6mm seat post. That larger diameter post flexes less than a 27.2mm post, providing a firmer pedaling platform for faster climbs with less wasted energy. Though the flexy 27.2 post might seem to be a good choice as an offset to the firm ride qualities of aluminum, both the Icon Elite and Pro are spec’ed with 31.6mm carbon fiber seat posts to damp in-saddle road feedback, keeping you fresher, longer.
One of the Xenith attributes we could NOT replicate in the Icon was its ability to damp road vibrations. Aluminum is just not as competent in this area as carbon fiber. But for us, this was a plus. If there is any one word that defines the Icon ride, it’s “immediate”. Step on the pedals and you move NOW. Lean to carve a turn and you’re ON IT like a freight train on tracks. There’s an immediacy in your connection to the road on aluminum. With carbon fiber, you tend to feel a bit more insulated from the road. It’s like listening to music with noise-cancelling headphones instead of LIVE. So while there’s a slight trade-off in comfort in selecting aluminum for the Icon over carbon fiber, many riders prefer that immediate connectedness and the confidence that comes from knowing exactly where you are on the road. We still made sure the frame was designed with just enough “give” for daylong rides. But what you are really going to appreciate is its ruthless efficiency. This is speed stripped down to its essence.
The Icon is not just a lighter, faster version of our aluminium Venturas. When we put this project on the design board, we knew we didn’t just want to make a bike that could make a difference. We also wanted to MAKE it differently. Which is what Synthesis is all about: small batch manufacturing. A process that understands a great riding experience begins with a great building experience, one frame at a time.
We are all-in. Disc brake technology provides superior stopping and safer braking no matter the conditions. They offer increased control and better modulation as you vary from being at-speed to slowing down or stopping. They are significantly less affected by rain and wet conditions, and eliminate any rim heat build-up that can come with caliper brakes. Gone is the need to be concerned with carbon rim deformation. Whether the streets of NYC or LA, or long and winding open roads, the control and safety that comes with disc brakes will only heighten the experience that comes with a riding a Jamis.
Enhanced Compliance Offset (ECO) is proven technology borrowed from our already unique Renegade and Ventura fork design. Those forward sweeping fork blades provide more vertical ride compliance than their standard road counterparts. Through our research we were able to adapt this same technology to the Icon’s rear triangle. We created a custom dropout that moved the seatstays back several millimeters from rear axle center, and removed the rear brake bridge in a combined addressing of greater vertical compliance and lessening of road chatter. The ECO’s result is a more comfortable and controlled ride without any compromise in torsional or lateral stiffness. Proven power transfer and precise immediacy in road connection, which is synonymous with last year’s Icon, remains unchanged.
UPGRADES / CHANGES FROM PREVIOUS MODEL
• Redesigned ICON frame to accept 28c tires
• Shimano 105 FD-5801
• American Classic 2622 disc tubeless wheelset
• Vittoria Zaffiro Slick, 700 x 25c, folding
• 3T Ernova bar
• 3T ARX II stem
|Frame||Synthesis double-butted 6061 aluminum tubeset, SST tubing diameters, 12x142 thru-axle with Jamis MTS (Modular Thru-axle System), butted chainstays with clearance for 28c and flat mount disc brake mounts, twin seat stays, 1.5 - 1 1/8” tapered head tube, Press Fit 30 BB shell, 34.9mm seat tube and replaceable derailleur hanger.|
|Fork||Jamis Road Disc carbon composite, FEA optimized Near Net SPV molding process, 1.5” hollow formed crown, monocoque one-piece forming technology, flat mount disc brakes with internal cable, 12mm Jamis MTS (Modular Thru-axle System) with stainless interface and carbon dropouts|
|Headset||FSA integrated, sealed bearing with nylon upper compression ring, 1.5 - 1 1/8”|
|Wheels||American Classic 2622 Tubeless 6-bolt Disc wheelset, 11-speed wheelset, 32H, 26mm rim height with 22.7x18.5 width, AC 6-bolt alloy hubs with round spokes, front 12mm/rear 12x142 thru-axle|
|Tires||Vittoria Zaffiro, 700 x 25c, folding|
|Derailleurs||Shimano 105 RD-5800 rear and 105 FD-5801 braze-on front with 34.9mm alloy clamp|
|Shiftlevers||Shimano ST-RS505 Dual Control STI, 22-speed|
|Cassette||Shimano 11-speed, 11-28T|
|Crankset||Shimano 105 FC-5800, 50/34T, 165mm (44), 170mm (48/51), 172.5mm (54/56), 175mm (58/61)|
|BB Set||Enduro PressFit 30 with Wheels MFG adaptors|
|Brakeset||Shimano BR-RS505 hydraulic disc brakes with resin pads, Shimano 160mm rotors, with Shimano ST-RS505 Dual Control STI levers|
|Handlebar||3T Ernova, 7075 aluminum, 31.8 x 380mm (44), 400mm (48/51), 420mm (54/56), 440mm (58/61)|
|Stem||3T ARX II, 3D forged 2010 alloy, 6˚ x 90mm (44/48/51), 100mm (54/56), 120mm (58/61)|
|Tape||Fizik Microtex Superlight Soft Touch tape|
|Seat Post||Jamis carbon fiber micro-adjust, 31.6 x 300mm with Jamis 7075-AL CNC aluminum 1-bolt seat post clamp|
|Saddle||Selle Royal Seta S1 with integrated clip system|
|Sizes||48, 51, 54, 56, 58, 61cm|
|SIZE||TOP EFFECTIVE||HEAD ANGLE||SEAT ANGLE||CHAIN STAY||WHEEL BASE||FORK RAKE||BB DROP||HEAD TUBE||STANDOVER||STACK||REACH|
|44||19.49 / 495||70.5˚||73˚||16.34 / 415||38.78 / 968||1.97 / 50||2.69 / 68.5||3.94 / 100||27.64 / 702||19.41 / 493||14.64 / 372|
|48||20.27 / 515||71.5˚||73˚||16.34 / 415||38.11 / 968||1.97 / 50||2.69 / 68.5||3.94 / 100||28.15 / 715||19.53 / 496||14.29 / 363|
|51||20.82 / 529||72˚||73˚||16.34 / 415||38.54 / 979||1.97 / 50||2.69 / 68.5||4.72 / 120||29.33 / 745||20.35 / 517||14.61 / 371|
|54||21.42 / 544||73˚||73˚||16.34 / 415||38.46 / 977||1.69 / 43||2.69 / 68.5||5.51 / 140||30.16 / 766||21.30 / 541||14.92 / 379|
|56||22.24 / 565||73˚||73˚||16.34 / 415||38.90 / 988||1.69 / 43||2.69 / 68.5||6.30 / 160||30.90 / 785||22.09 / 561||15.51 / 394|
|58||22.83 / 580||73˚||73˚||16.34 / 415||39.88 / 1013||1.69 / 43||2.69 / 68.5||7.08 / 180||31.61 / 803||22.83 / 580||15.86 / 403|
|61||23.23 / 590||73˚||73˚||16.34 / 415||40.27 / 1023||1.69 / 43||2.69 / 68.5||7.87 / 200||32.28 / 820||23.58 / 599||16.02 / 407|
JAMIS ICON: A BUDGET RACER THAT PUTS PERFORMANCE UP FRONT
FIT & SIZING
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