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Jamis Portal A1

Jamis Portal A1
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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 A1. 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 Fox 34 fork easily handles the rough stuff up front, ensuring your trail-spec'd DT Swiss M1900 Spline 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 Shimano XT 12-speed drivetrain and XT Ice Tech 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, Fox Float DPS Performance Series EVOL shock w/3-position compression, 10mm hardware, replaceable derailleur hanger
Fork Fox Rhythm 34 Float 29" w/ sweep adjust compression & lock-out, 15 x 110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 130mm travel
Headset FSA Orbit IS Integrated, 8mm cone spacer
Rear Shock Fox Float DPS Performance Series EVOL shock w/3-position compression
Axles Front: 15x110mm
Rear: 12x148mm
Rims/Wheels DT Swiss M1900 SPLINE 25 29" tubeless
Hubs DT 370
Spokes DT Champion
Tires Vittoria Martello 29 x 2.35", TNT tubeless
Crankset Race Face Aeffect
Chainrings 32T
Bottom Bracket Race Face BSA
Chain KMC X12, 12-speed
Front Derailleur Shimano XT, 12-speed
Rear Derailleur Shimano XT, 12-speed
Cassette/Rear Cogs Shimano XT M8100, 12-speed, 10-51T
Shifters Shimano XT, 1x12-speed
Handlebars Race Face Aeffect R, 780mm x 20mm rise, 35mm diameter
Tape/Grips Jamis Lock-On
Stem Race Face Aeffect R, 50mm extension, 35mm clamp diameter
Brakes Shimano XT M8100 Ice-Tech hydraulic disc, RT-800 180mm front & 160mm rear centerlock rotors
Saddle WTB Volt
Seat Post KS Rage Dropper, Southpaw remote

* Subject to change without notice.


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