Jamis Bikes | 2021 Portal A2

Modern trail capability built to handle aggressive riding without losing efficiency.

The Jamis Portal A2 is a full suspension trail bike designed for riders who want confident descending, efficient climbing, and modern trail geometry in a versatile 29er platform.

Built around Jamis’ 3VO suspension system, the 2021 Portal A2 combines balanced suspension performance, aggressive trail geometry, and dependable Shimano Deore 12-speed components into a bike equally capable on technical climbs, flowing singletrack, and rough descents. Unlike overly specialized enduro bikes, the Portal A2 maintains efficient pedaling characteristics while still delivering confident suspension performance for demanding trail riding.

Key Features

• 3VO Suspension Platform
Jamis’ 130mm 3VO suspension system improves pedaling efficiency, traction, and bump compliance across varied terrain.

• Triple-Butted Aluminum Frame
Lightweight and durable aluminum construction delivers balanced stiffness, control, and long-term trail durability.

• Fox Suspension Package
Fox Float DPS rear shock paired with a Fox 34 Rhythm fork provides responsive suspension performance and improved trail control.

• Shimano Deore 1x12-Speed Drivetrain
Wide-range Shimano Deore gearing delivers dependable shifting performance for technical climbs and aggressive trail riding.

• 29er Trail Wheel Platform
29-inch wheels paired with tubeless-ready Vittoria tires improve rollover capability, traction, and momentum on rough terrain.

Technical Specifications

• Category
Full Suspension Trail Bike

• Discipline
Trail MTB

• Frame
Triple-Butted 6061 Aluminum, 130mm Travel 3VO Suspension, Enduro Max Sealed Bearing Pivots, 12x148mm Thru-Axle, Internal Dropper Routing, ISCG05 Mounts

• Bottom Bracket Standard
BSA, 73mm, Threaded

• Rear Shock
Fox Float DPS Performance Series EVOL, 3-Position Compression

• Fork
Fox 34 Rhythm Series Float 29", 130mm Travel, Air Spring, Sweep Adjust Compression, Lock-Out, 15x110mm Axle

• Travel
Front: 130mm
Rear: 130mm

• Drivetrain
Shimano Deore 1x12-Speed

• Rear Derailleur
Shimano Deore 12-Speed

• Shifters
Shimano Deore 1x12-Speed

• Crankset
Race Face Ride, 32T

• Bottom Bracket
Race Face BSA

• Cassette
Shimano M6100 12-Speed, 10-51T

• Chain
KMC X12 12-Speed

• Brakes
Shimano MT420 4-Piston Hydraulic Disc Brakes

• Rotors
180mm Front / 160mm Rear Shimano RT30 Rotors

• Wheelset
Stan’s No Tubes Flow D 29" Rims, Shimano MT410 Hubs

• Tires
Vittoria Mazza 29x2.4" TNT Tubeless

• Handlebar
Race Face Ride, 760mm Width, 20mm Rise, 35mm Clamp

• Stem
Race Face Ride, 50mm

• Seatpost
KS Rage Dropper with Southpaw Remote

• Saddle
WTB Volt

• Headset
FSA Orbit IS Integrated

• Color Options
Storm Grey (#5E6468)

Geometry

Built for riders seeking a modern trail bike with efficient suspension performance, confident descending capability, and dependable all-around trail handling.