Adaptive Cable Entryの頭文字をとったACEシステム。 変速ケーブル、電動変速のワイヤーをフレーム内蔵に するためのシステムである。将来的に電動変速へのアップ グレードを見越しライダーのため、それぞれに対応する 各種グロメットが付属する。
BBの回転を担うベアリング、そしてリアサスの滑らかな動きを実現するベアリングには、アメリカ製『ENDURO』社のものが使われる。このベアリングは、 リテイナーの表面積を増やしたことで耐荷重性を一般より35~45%アップ。さらにベアリングの両脇をシールで防護しグリスの流出を90%防いでいる。 またカーボンフレームには、磁鉄鉱にて表面加工したMAX BLACK OXI DEを採用。ボールの固さと耐久性を高め、BB、ピボットともに長期間の滑らかな 回転を実現する。
JAMISのバイクにのってる人々は必ずといって「乗りやすい」というお声をいただきます。 その理由としてJAMISはフレームサイズごとに最適なジオメトリーとパーツをチョイスしてます。 そしてJAMISはさらなるフィットを追求し長い研究を経て、フレームサイズごとに最適なパイプ径の調整を行ってます。 これをJAMISでは「SST」サイズ・スペシフィック・チュービングと呼んでます。
BBスピンドルの直径を30mmまで太くし、ベアリング 全体の直径も上げたことにより、ベアリングとハウジング 接触面での回転抵抗を下げ耐久性を高めるBBシステム。
BBスピンドルの直径を30mmのままに、全体の幅を 86.5mmまで広げた新規格のBBシステム。Qファク ターを変えずにBB周りの剛性を高められたことに 加え、デザインの自由度も上げられた。その結果、 チェーンステー剛性を高めるフレームサイズごとの専 用デザイン、そしてタイヤクリアランスを大幅に広げる （RENEGADE）ことが可能となった。
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.
We’ve taken our revolutionary Near Net dual-molding manufacturing process, that utilizes both silicone and polystyrene internal cores to support the frame shape while it is being pressurized within the steel mold, and added a vacuum purge procedure before molding that compresses and eliminates all air between carbon plies. Compaction is absolutely optimized. Not only is weight reduced while stiffness and strength are increased, but over-reliance on fragile and harsh-riding super-high modulus fiber is minimized. The result is lighter, faster, stiffer, stronger frame that simply rides better. A dual-molding manufacturing process that yields near perfect compaction, and eliminates fiber wash and wrinkles during the molding process.
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.
Jamis’ MTS system increases the12mm thru-axle fit-range by offering multiple aluminum inserts designed to accommodate the various threaded thru-axles produced by any number of hub and fork makers.
The top and down tubes of the Xenith frame are tapered and tri-ovalized for optimal stiffness in the lightest possible package. This tubing design orients the axis of each of the ovals to increase lateral and torsional stiffness while optimizing vertical compliance in the precise location it is needed.
Having direct-mount/dual-pivot calipers bolted to the chainstays frees the seatstays from their traditional role of brake system reinforcement. So we can focus on designing and tuning the seatstays for their primary purpose: ride compliance and torsional stability.
Size specific tubing optimizes ride quality and assures the lightest possible weight for each frame size. SST engineering applies not only to the main frame – our 56, 58 and 61cm frames are designed with top and down tubes 10% larger than on the 44 – 54cm -- but to the seat stays as well. The result is a bike that handles precisely, accelerates explosively and offers compliance for EVERY rider.
Shimano’s direct mount/dual-pivot calipers are mounted on the chainstays of all Xenith models and reside symmetrically over the wheel, with arm placement closer to the rim. When coupled with equal cable pull on each side of the rim, modulation is increased significantly. We include an inline QR so wheel changes are no sweat.
Every 2017 Xenith is equipped with our new Adaptive Cable Entry (ACE) system that allows our frames to cleanly manage the internal routing of brake and derailleur cables 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.
The BB386 EVO bottom bracket design amplifies the benefits of the proven BB30 system. It takes the lighter, stiffer 30mm alloy spindle from the BB30 design, incorporates press-fit bearing cups instead of direct-fit bearings and marries both to a wider 86.5mm BB shell. 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 does not crowd the rear tire and allows extra room for a 28C.
Chainstay design is critical for the efficient transfer of power from pedal to wheel. But simply beefing up the entire area to prevent frame flex under pedaling torque and disc brake forces can yield unnecessary weight gain and stiffness. The Xenith chainstay design maximizes stiffness while minimizing weight through asymmetrical design - the driveside chainstay is 15% larger and 30% stiffer to offset drivetrain induced flex.
UPGRADES FROM XENITH COMP
Shimano Ultegra 11-speed group including crankset
American Classic Victory 30 Centerlock disc tubeless 11-speed wheelset
Shimano BR-RS805 flat mount hydraulic disc brakes with Centerlock Ice Tech 160mm rotors
UPGRADES / CHANGES FROM 2016
Redesigned Xenith flat mount disc brake frame with 12mm Jamis MTS (Modular Thru-axle System)
Redesigned Xenith flat mount disc brake fork with 12mm Jamis MTS (Modular Thru-axle System)
American Classic Victory 30 Centerlock disc tubeless wheelset
Shimano Ultegra RD-6800 rear derailleur
Shimano BR-RS805 flat mount hydraulic disc brakes with Centerlock Ice Tech 160mm rotors
|Frame||Jamis Road carbon fiber monocoque Dyad Plus T700/FRP, FEA optimized Near Net SPV molding process, SST tubing diameters, oversized seat tube, 1.5 - 1 1/8” head tube with carbon bearing races, EVO386 carbon BB shell, ACE internal cable routing compatible for both Di2 wires or traditional cables, rider tuned twin seat stays, oversized asymmetrical chainstays with flat mount disc brake mounts, 12x142 thru-axle with Jamis MTS (Modular Thru-axle System), carbon drop outs with replaceable alloy FD mount and RD 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 carbon dropouts|
|Headset||Ritchey Pro Drop-In, sealed bearing with nylon upper compression ring, 1.5 - 1 1/8”|
|Wheels||American Classic Victory 30 Centerlock disc tubeless 11-speed wheelset, 24H, 30mm rim height with 22.7x18.1 width, AC Victory 30 alloy hubs and bladed spokes, front 12mm/rear 12x142 thru-axle|
|Tires||Vittoria Zaffiro Pro Slick, 700 x 23c, folding|
|Derailleurs||Shimano Ultegra RD-6800 rear and Ultegra FD-6800 braze-on|
|Shiftlevers||Shimano ST-RS685 Dual Control STI, 22-speed|
|Cassette||Shimano Ultegra CS-6800 11-speed, 11-28T|
|Crankset||Shimano Ultegra FC-6800, 50/34T, 170mm (48/51), 172.5mm (54)|
|BB Set||Enduro PressFit 30 and Wheels MFG EVO adaptors|
|Brakeset||Shimano BR-RS805 flat mount hydraulic disc brakes with resin pads, Centerlock Ice Tech 160mm rotors with Shimano ST-RS685 Dual Control STI levers|
|Handlebar||Ritchey Comp Logic Curve, 6061 double-butted aluminum, 31.8 x 400mm (48/51), 420mm (54)|
|Stem||Ritchey Comp 4-Axis, 3D net forged 6061 alloy, 6˚ x 90mm (48/51), 100mm (54)|
|Tape||Fizik Microtex Superlight Soft Touch tape|
|Seat Post||Jamis carbon fiber micro-adjust, 31.6 x 300mm with 7075 aluminum 1-bolt seat post clamp|
|Saddle||Fizik Arione R7 with intergrated clip system and manganese rails|
|Sizes||48, 51, 54cm|
|SIZE||TOP EFFECTIVE||HEAD ANGLE||SEAT ANGLE||CHAIN STAY||WHEEL BASE||FORK RAKE||BB DROP||HEAD TUBE||STANDOVER||STACK||REACH|
FIT & SIZING