Jamis Portal A22019
Frame Materials - Lightweight and strong High Modulus carbon fiber or triple-butted 6061 series aluminum tubing, featuring custom over-sized & tapered tubing for increased frame stiffness and durability. Enduro Bearings - USA made Enduro Max sealed bearings sustain 40% more load capacity than standard radial bearings & provide more lateral support for the multiple forces associated with mountain bike pivots. MAX bearings use CRC Marine Grease that will not wash out or breakdown under extreme circumstances. 10mm Shock Hardware - Our 10mm shock hardware is NOT the standard from our rear shock suppliers. We have to pay more for it and our productions lead times are usually increased because we specify it. But the increase in lateral and torsional stiffness for our frames and the rear shock durability and performance is worth every extra dollar. One and Only - The 1x drivetrain philosophy is to make it simpler, lighter and more durable. Specific chainring tooth profiles, clutch-type rear derailleurs and wide range cassettes are developed for an incredibly wide gear range and maximum control without the need to chain tensioning devices or guides. Tapered Head Tube - Riding fast with control requires steering precision, which starts with the front of the bike. Stiffening this area results in less wheel deflection, more wheel control. A full 1.5 head tube and steerer would achieve this, but would add unnecessary weight and bulk, and limit stem choices. But a tapered 1 1 /8 to 1 1 /2 head tube serves up a significant increase in rough terrain tracking and stability without much of a weight penalty compared to standard 1 1 /8 systems. Why Thru Axles? - Securing the rear wheel to the frame by threading a 12mm axle into the rear drop-outs is not only safer, its stiffer. The rear wheel tracks directly in line with the frame, for more precise handling, so you can go faster with more confidence. The increase in stiffness of a 15mm fork axle improves steering & handling significantly. It also puts less stress on the forks internals, improving fork durability and performance. The hub drop outs provide a self centering feature for the wheel for fast, easy installation. Short Chainstays - The rear wheel tucks in with short chainstays. With a 12x148 rear hub, youve got a stiff and responsive rear end.
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