![]() But the increase in lateral and torsional stiffness for our frames and the rear shock durability and performance is worth every extra dollar and every extra delivery day.ġ5mm thru-axle QR’s offer all the benefits of the 20mm thru-axle design (stiffness!) + the benefits of the standard 9mm QR system (quick wheel removal!) without any of the down sides. We have to pay more for it and our production lead times are usually increased because we specify it. ![]() Our 10mm shock hardware is NOT the standard from our rear shock suppliers. MAX bearings use CRC Marine Grease that will not wash out or breakdown under extreme circumstances. 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. The result: more optimized shapes and less weight. For example, whereas shape designs can be applied to 25% of the tube using hydroforming, SPF allows up to 90% manipulation. This allows more complicated shapes to be produced that cannot be made using traditional forming techniques. SPF is carried out at high air temperatures, where the tube structure is in its most ‘plastic’ and formable state. The custom frame tubes on the Defcon are made by SPF Air Forming. The absence of a seat stay bridge provides more tire and suspension clearance while creating shorter chain stays and seat stays for even greater stiffness and better handling. The custom one-piece bell crank on the Defcon increases frame stiffness while allowing for the elimination of a seat stay bridge. Read more about Jamis’ approach to suspension > Because the rear shock can be pumped to lower air pressures without performance detriment, shock and seal life are optimized and a greater range of adjustability is available. ![]() The rear shock can be tuned more linearly for a smoother, more plush ride without bottoming. There are multiple benefits to a more progressive suspension system. The leverage exerted by the Defcon mp4 suspension is progressive. ![]() Jamis New 2017 Defcon 2 All mountain Full Suspension Bicycle. ![]()
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