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Jamis: Portal A2 - 2019

Jamis

$2,999.00
Condition:
New
Quantity:

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Product Description

Jamis: Portal A2 - 2019

Introducing Jamis’ new full suspension mountain bike for 2019, Portal. Featuring the single most capable suspension design ever brought to the market, 3V0 Suspension Technology.

 

The Portal® was developed by the Jamis design team over the past two years utilizing Chris Currie of Speedgoat Design’s patented 3v0 suspension platform. They was able to combine the efficiency of a hardtail with the proper support of precisely-controlled active suspension because of the 3V0 system’s unique virtual pivot characteristics.

3VO’s initial rearward axle path allows the bike to be supple on small bumps and square edge hits while its tightly tuned relationship with the system’s leverage ratio keeps the suspension highly reactive even while pedaling.

Imagine having two bikes in one, that’s essentially what we’ve got with the 3V0. The tuned multi-phase leverage ratio with initial rising rate provides an unparallelled pedaling platform while remaining keenly adept at sustaining repeated bumps without holdup.

 

Unlike most dual link designs, the 3VO system’s unique instant center path maintains consistent alignment with the chainline. The 3VO system projects an instant center behind the bottom bracket and directly along the chainline. The 3VO system’s patented rearward instant center is more effective and consistent than conventional dual link designs because it locates each of its instant center points along the chainline. The 3VO system’s instant center path also creates a consistent anti-rise response and an anti-squat response near 100% throughout the travel range, counteracting rider weight transfer under both braking and acceleration to keep all pedal input driving you forward while allowing the suspension to remain active and responsive to impacts, even while pedaling and braking.

 

KEY ADVANTAGES OF THE 3VO INSTANT CENTER

COMPLETE EFFICIENCY

The most efficient propulsion, with no loss of pedal energy due to suspension movement, regardless of gear combination, wheel travel, terrain, and rider power output.

BRAKE FORCES ISOLATED

System remains highly active and responsive during even the most aggressive braking, and high anti-rise counteracts forward weight shift to maintain stability.

The unique rearward instant center of the 3VO system allows for a highly tunable axle path and takes full advantage of virtual pivot locations, placing the pivot in a location impossible to achieve with a mechanical pivot, and creating a shorter effective lever, allowing the swingarm rotation to feel noticeably quicker and more responsive. A trademark of the design is the short distance between the instant center and the rear axle, which allows for excellent anti-squat behavior and a high degree of responsiveness to bump forces.

The axle path initially moves slightly rearward, allowing the bike to be supple and responsive to small bumps. It's optimized to be at its most rearward position when the bike is just beyond its sag point, allowing for excellent anti-squat stability.

The shape of the 3VO’s axle path, allows the system to be highly reactive to small bumps, even under pedaling.

KEY ADVANTAGES OF THE 3VO AXLE PATH

REACTIVE TO SQUARE EDGE AND SMALL BUMP IMPACTS

The initial rearward phase of the axle path allows the rear wheel to move in the direction of least resistance to bump forces more freely, for excellent square edge and small bump sensitivity.

POSITION SENSITIVE

The rearmost position of the axle is found just beyond the most common sag point, offering additional pedaling stability to the already highly efficient rearward instant center design of the 3VO system.

NO PEDAL KICKBACK

After an initial rearward motion, the axle path moves forward at a rate optimized to provide maximum tire clearance for the specific amount of travel of the bike while also ensuring no pedal kickback is felt at the pedals.

OVERALL VERTICAL PATH

The slight initial rearward motion followed by a balanced forward motion creates an axle path that is predominantly vertical overall, offering improved small bump compliance as well as the ability to absorb larger impacts efficiently.

Portal's leverage ratio begins with a slight rising rate for an optimal pedaling platform that peaks just beyond the sag point then transitions to a slight falling rate to allow for medium and larger hits to be absorbed efficiently.

The 3VO system excels at stepping down off of ledges and into holes in the trail, without disrupting forward momentum or wallowing during compression. An initial rising rate is almost always more energy efficient and responsive than an initial falling rate.

Beyond the initial slight rising rate, stage two of the system employs a slight falling rate. Combined with the inherent anti-squat and reactive instant center location, this dual stage leverage rate allows the bike to have both excellent pedal acceleration and be very sensitive to bump forces, while also being able to absorb large impacts more efficiently.

 

 

SPECIFICATIONS

Frame

 

Triple-butted 6061 aluminum, 130mm travel 3VO suspension, Enduro® Max sealed bearing pivots, 1.5 - 1 1/8” tapered head tube, 12x148mm thru-axle, Internal dropper post routing, Custom Jamis upper chainguide mounts, ISCG05 lower chainguide mounts, Rock Shox Deluxe R DebonAir shock, 10mm hardware, replaceable derailleur hanger

 

Fork

Rock Shox Revelation RC 29”,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 35mm stanchions, 130mm travel

Headset

FSA Orbit 1.5 I.S. integrated cup, 8mm cone spacer

Wheels

WTB ST i25 TCS 29” tubeless rims, 32H, Formula sealed bearing 15x110mm front & 12x148mm rear 6-bolt disc hubs, stainless spokes

Tires

Vittoria Martello 29 x 2.35”, TNT tubeless

Derailleurs

Shimano SLX Shadow Plus, 11-speed

Shift levers

Shimano SLX, 1x11-speed

Chain

KMC X11, 11-speed

Cassette

Shimano M7000, 11-speed, 11-46T

Crankset

Race Face Ride, 32T

BB Set

Race Face BSA

Pedals

N/A

Brakeset

Shimano MT500 hydraulic disc, 180mm 6-bolt rotors

Handlebar

Race Face Ride, 760mm x 20mm rise, 35mm diameter

Stem

Race Face Ride, 50mm extension, 35mm clamp diameter

Grips

Jamis Lock-On

Seat Post

KS E10i Internal Dropper, Southpaw remote

Saddle

WTB Volt

Sizes

XS (14.5), S (15.5), M (17), L (19), XL (21)

Color

Charcoal

Weight

32.50 lbs

*Features and Specifications subject to change without notice.

 

FIT & SIZING

SIZE

TT EFFECTIVE

HT ANGLE

ST ANGLE

CHAINSTAY

WHEELBASE

BB DROP

HEADTUBE

STANDOVER

STACK

REACH

XS/14.5"

22.0 / 560

LO 67.5° HI 68°

LO 74.5° HI 75°

17.2 / 437

44.2 / 1122

LO 1.3 / 33 HI 1.0 / 26

3.7 / 95

LO 28.7 / 731 HI 29.1 / 738

23.5 / 597

15.6 / 397

S/15.5"

23.0 / 585

LO 67.5° HI 68°

LO 74.5° HI 75°

17.2 / 437

45.2 / 1148

LO 1.3 / 33 HI 1.0 / 26

4.1 / 105

LO 29.7 / 754 HI 29.9 / 761

23.9 / 606

16.5 / 418

M/17"

24.0 / 610

LO 67.5° HI 68°

LO 74.5° HI 75°

17.2 / 437

46.2 / 1173

LO 1.3 / 33 HI 1.0 / 26

4.5 / 115

LO 29.5 / 749 HI 29.8 / 756

24.2 / 615

17.3 / 439

L/19"

25.0 / 635

LO 67.5° HI 68°

LO 74.5° HI 75°

17.2 / 437

47.2 / 1198

LO 1.3 / 33 HI 1.0 / 26

4.9 / 125

LO 29.7 / 754 HI 29.9 / 761

24.6 / 625

18.2 / 461

XL/21"

26.0 / 660

LO 67.5° HI 68°

LO 74.5 HI 75°

17.2 / 437

48.2 / 1224

LO 1.3 / 33 HI 1.0 / 26

5.3 / 135

LO 30.5 / 774 HI 30.7 / 781

24.9 / 634

18.9 / 482

 

 

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