Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Jamis
2018 Jamis Defcon 3
Value Guide market data · 2018 Jamis Defcon 3
12-month trend
7%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2018 Jamis Defcon 3
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Defcon model years
2018 Defcon 3 lineup
Overview
About this bike
2018 Jamis Defcon 3 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Rear Shock
- X-Fusion O2 Pro RLX High Volume air shock w/3-position compression,
- 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
- 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
Drivetrain
- Groupset
- 2018 Jamis Defcon 3
- Crankset
- SRAM NX,
- Bottom Bracket
- Enduro® BSA
- Rear Cogs
- SRAM 1130, 11-speed, 11-42T
- Chain
- KMC X11-1 EPT (Anti-Rust), 11-speed
- Rear Derailleur
- SRAM NX, 11-speed
- Chainrings
- 32T
- Shifters
- SRAM NX, 1x11-speed
Brakes
- Brake Levers
- TRP Slate
- Brakes
- TRP Slate T4 4-piston hydraulic disc, 180mm 2-piece rotors
Cockpit
- Saddle
- WTB Volt Sport
- Headset
- FSA Orbit 1.5 Zero-Stack internal cup, 8mm cone spacer
- Stem
- Answer ATAC AME, 50mm extension, 31.8mm clamp diameter
- Handlebars
- Answer ProTaper Riser, 780mm x 25mm rise, 31.8 mm diameter
- Seat Post
- KS eTen, 100mm travel, Southpaw remote
- Tape/Grips
- Jamis Lock-On
Wheels & Tires
- Hubs
- Formula sealed bearing 6-bolt hubs
- Tires
- Vittoria Goma 27.5 x 2.4" front & & 2.25” rear, TNT tubeless
- Axles
- Front: 15x100mm thru-axle; Rear: 12x142mm thru-axle
- Spokes
- Stainless spokes & brass nipples
Pedals
- Pedals
- N/A
Accessories
- Rims/Wheels
- WTB ST i29 TCS 27.5" tubeless rims
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.