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Jamis Defcon 3

Jamis Defcon 3
Raw Aluminum
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This is where the 27.5” wheel size really shines: on a 160mm travel all-mountain enduro machine that utilizes Jamis' proven mp4 suspension for pedaling efficiency, with modern geometry and top-level suspension to tackle bigger hits and aggressive descents at higher speeds. This progressive suspension design delivers plush rear wheel traction while still resisting bottom out. Rear thru-axles, short chainstays and a roomy front-center provide stiffness, quick cornering and playful handling. If you want to do it all and fast, this is the bike.


Frame Triple-butted 6061 air-formed aluminum, 160mm travel mp4 suspension, Enduro® Max sealed bearing pivots, 1.5 - 1 1/8” tapered head tube, asymmetrical chainstays, dropper post routing, ISCG05 chainguide mounts, 10mm hardware, replaceable derailleur hanger, Formula axle
Fork X-Fusion Sweep Roughcut RCP 27.5" w/ 3-position compression, air spring compression & lock-out, rebound adjust, tapered alloy steerer, 34mm uppers,160mm travel
Rear Shock X-Fusion O2 Pro RLX High Volume air shock w/3-position compression,
Headset FSA Orbit 1.5 Zero-Stack internal cup, 8mm cone spacer
Axles Front: 15x100mm thru-axle; Rear: 12x142mm thru-axle
Rims/Wheels WTB ST i29 TCS 27.5" tubeless rims
Hubs Formula sealed bearing 6-bolt hubs
Spokes Stainless spokes & brass nipples
Tires Vittoria Goma 27.5 x 2.4" front & & 2.25” rear, TNT tubeless
Crankset SRAM NX,
Chainrings 32T
Bottom Bracket Enduro® BSA
Chain KMC X11-1 EPT (Anti-Rust), 11-speed
Rear Derailleur SRAM NX, 11-speed
Rear Cogs SRAM 1130, 11-speed, 11-42T
Shifters SRAM NX, 1x11-speed
Handlebars Answer ProTaper Riser, 780mm x 25mm rise, 31.8 mm diameter
Tape/Grips Jamis Lock-On
Stem Answer ATAC AME, 50mm extension, 31.8mm clamp diameter
Brake Levers TRP Slate
Brakes TRP Slate T4 4-piston hydraulic disc, 180mm 2-piece rotors
Pedals N/A
Saddle WTB Volt Sport
Seat Post KS eTen, 100mm travel, Southpaw remote

* Subject to change without notice.


Part Numbers

Option UPC MPN
Raw Aluminum / 15-inch 845436018553 03-0639 : 03-0639RW
Raw Aluminum / 17-inch 845436018560 03-0639 : 03-0640RW
Raw Aluminum / 19-inch 845436018577 03-0639 : 03-0641RW
Raw Aluminum / 21-inch 845436018584 03-0639 : 03-0642RW