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Jamis Portal A2

Jamis Portal A2


Portal - noun: DOOR, ENTRANCE; especially a grand or imposing one.

Pass boldly through to the other side and impose on the most fun you've had on two wheels with the Jamis Portal A2. Its triple-butted alloy frame swings your rear wheel through 130mm of micro-tracking 3VO suspension, renowned for its trail-contouring ability that goes hand-in-hand with big-hit burliness. A 130mm Rock Shox Revelation RC fork easily handles the rough stuff up front, ensuring your trail-spec'd WTB ST i25 TCS wheels track right where you want them, ready and willing to dig deep, wrapped in Vittoria's Martello tubeless tires.

The entire trail opens to you when you've got the proven combo of a huge-range SRAM SX Eagle 12-speed drivetrain and Magura MT4 brakes to ensure you have the leverage when you need it, the speed when you want it, and the power to reign it all in when the speed gets critical. And, the Portal will feel as familiar as walking out your front door thanks to a rider-tuned Race Face cockpit, and an instantly dialable stance, courtesy of your KS Rage dropper.

Dropper posts

A dropper seatpost allows you to quickly lower and raise your seat to give you an ideal riding position. Dropping your seat creates a lower center of gravity for better control and maneuverability on steep descents, while raising it puts you at normal riding height for efficient pedaling.

Construction can include either hydraulic- or cable-actuated systems and the post’s travel can either be infinitely adjustable or stopped at set intervals, depending on the model.

Dropper seatposts come in standard lengths and diameters and vary by the amount of travel.


Frame Triple-butted 6061 aluminum, 130mm travel 3VO suspension, Enduro Max sealed bearing pivots, 1.5 - 1 1/8" tapered head tube, 12 x 148mm thru-axle, internal dropper post routing, custom Jamis upper chainguide mounts, ISCG05 lower chainguide mounts, Rock Shox Deluxe Select R DebonAir shock, 10mm hardware, replaceable derailleur hanger
Fork Rock Shox Revelation RC 29",15 x 110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 130mm travel
Headset FSA Orbit IS Integrated, 8mm cone spacer
Rear Shock Rock Shox Deluxe Select R DebonAir shock
Axles Front: 15x110mm
Rear: 12x148mm
Rims/Wheels WTB ST i25 TCS 29" tubeless rims
Hubs Formula sealed bearing 15 x 110mm front & 12 x 148mm rear 6-bolt disc
Spokes Stainless
Tires Vittoria Martello 29 x 2.35", TNT tubeless
Crankset SRAM X1 Eagle
Chainrings 32T
Bottom Bracket SRAM DUB
Chain SRAM SX Eagle, 12-speed
Front Derailleur SRAM SX Eagle, 12-speed
Rear Derailleur SRAM SX Eagle, 12-speed
Cassette/Rear Cogs SRAM PG1210, 12-speed, 11-50T
Shifters SRAM SX Eagle, 1x12-speed
Handlebars Race Face Ride, 760mm x 20mm rise, 35mm diameter
Tape/Grips Jamis Lock-On
Stem Race Face Ride, 50mm extension, 35mm clamp diameter
Brake Levers HC
Brakes Magura MT4 hydraulic disc w/ HC levers, Storm HC 180mm front & 160mm rear 6-bolt rotors
Saddle WTB Volt
Seat Post KS Rage Dropper, Southpaw remote

* Subject to change without notice.

Part Numbers

Option UPC MPN
Charcoal / 14.5-inch 845436072685 03-2682CL
Charcoal / 15.5-inch 845436072692 03-2683CL
Charcoal / 17-inch 845436072708 03-2684CL
Charcoal / 19-inch 845436072715 03-2685CL
Charcoal / 21-inch 845436072722 03-2686CL