Jamis: Portal A2

Jamis: Portal A2

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Jamis: Portal A2

The Portal A2 is a rad full suspension mountain bike from Jamis and features their exceptional 3V0 Suspension Technology.

The Portal® was developed by the Jamis design team over the course of two years utilizing Chris Currie of Speedgoat Design’s patented 3v0 suspension platform. They were 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.


Size: XS/14.5", S/15.5", M/17", L/19", XL/21"




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


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


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


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


Vittoria Martello 29 x 2.35”, TNT tubeless


Shimano SLX Shadow Plus, 11-speed

Shift levers

Shimano SLX, 1x11-speed


KMC X11, 11-speed


Shimano M7000, 11-speed, 11-46T


Race Face Ride, 32T

BB Set

Race Face BSA




Shimano MT500 hydraulic disc, 180mm 6-bolt rotors


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


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


Jamis Lock-On

Seat Post

KS E10i Internal Dropper, Southpaw remote


WTB Volt


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




32.50 lbs

*Features and Specifications subject to change without notice.



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