
Velopedia Bicycle Archive
2026 Jamis Defcon E2
Electric-assist bicycle from the Velopedia specification archive.
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What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $5,999.95
- Sizes
- S, M, L, XL
- Colors
- Black Coal
- Geometry
- 4 manufacturer sizes · Geometry context
- Record coverage
- 23 preserved details · 3 archived images · original MSRP · preserved geometry
- Archive ID
- 900001535
Frameset
| Frame Construction | Triple-butted 6061 alloy, 150mm Horst Link suspension travel, 1.5 – 1 1/8” tapered head tube, 12x148mm thru-axle dropout, SR Suntour TriAir 2 2CR, UDH derailleur hanger |
|---|---|
| Frame Material | Aluminum |
| Fork | SR Suntour Aion 36 w/adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 160mm travel |
| Fork Material | Aluminum |
| Rear Shock | SR Suntour TriAir 2 2CR |
Drivetrain
| Component Group | Shimano Deore, 12-speed |
|---|---|
| Shifters | Shimano Deore, 1×12-speed |
| Rear Derailleur | Shimano Deore, 12-speed |
| Crankset | FSA CK-752, 34T, 160mm |
| Cassette | Shimano M6100, 12-speed, 10-51T |
| Chain | KMC X12, 12-speed |
Brakes
| Brakes | TRP Slate EVO 4-piston hydraulic disc, 180mm rotors |
|---|
Cockpit & Contact Points
| Headset | FSA Orbit IS Integrated, 8mm cone spacer |
|---|---|
| Handlebar | Race Face Chester, 780mm x 20mm rise, 35mm diameter |
| Stem | Race Face Chester, 40mm extension, 35mm clamp diameter |
| Saddle | WTB Rocket |
| Seatpost | KS Vantage adjustable Dropper 30.9mm, Westy 2.0 remote |
Wheels & Tires
| Wheels | Stan’s No Tubes Flow D rims, Novatec D791SB 15x110mm front & D902SB 12x148mm rear hubs, stainless spokes |
|---|---|
| Front Tire | Vittoria Mazza 29×2.4″ Enduro |
| Rear Tire | Vittoria Mazza 29×2.4″ Enduro |
| Wheel Size | 29 |
E-bike System
| Motor | Shimano DU-EP600 |
|---|---|
| Battery | Shimano BT-EN806, 630Wh |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Effective top tube | 590 mm | 615 mm | 640 mm | 665 mm |
| Head tube | 130 mm | 130 mm | 130 mm | 135 mm |
| Head-tube angle | 64.5° | 64.5° | 64.5° | 64.5° |
| Seat-tube angle | 76° | 76° | 76° | 76° |
| Chainstay / rear center | 455 mm | 455 mm | 455 mm | 455 mm |
| Wheelbase | 1236 mm | 1261 mm | 1286 mm | 1312 mm |
| Bottom-bracket drop | 25 mm | 25 mm | 25 mm | 25 mm |
| Reach | 431 mm | 456 mm | 481 mm | 506 mm |
| Stack | 639 mm | 639 mm | 639 mm | 643 mm |
| Standover height | 788 mm | 788 mm | 788 mm | 794 mm |
| Fork offset / rake | 44 mm | 44 mm | 44 mm | 44 mm |
Geometry source: Jamis first-party geometry table (2021 GEO - DEFCON®) ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
S geometry
Archive context: Its wheelbase of 1236 mm sits toward the longer end. Its stack of 639 mm sits toward the taller end. Its bottom-bracket drop of 25 mm sits somewhat shallower than typical.
Compared with 102 distinct electric-assist geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.M geometry
Archive context: Its wheelbase of 1261 mm sits toward the longer end. Its stack of 639 mm sits toward the taller end. Its bottom-bracket drop of 25 mm sits somewhat shallower than typical.
Compared with 113 distinct electric-assist geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.L geometry
Archive context: Its wheelbase of 1286 mm sits toward the longer end. Its bottom-bracket drop of 25 mm sits somewhat shallower than typical. Its reach of 481 mm sits somewhat longer than typical.
Compared with 107 distinct electric-assist geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.XL geometry
Archive context: The chainstay of 455 mm sits somewhat longer than typical. Its wheelbase of 1312 mm sits somewhat longer than typical. Its bottom-bracket drop of 25 mm sits somewhat shallower than typical.
Compared with 87 distinct electric-assist geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Parts & serviceability
Find replacement parts
More qualified parts (6)
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- BrakesBoth levers should feel firm and return cleanly. Check for fluid around the levers and calipers, inspect pad thickness and contamination, and look for worn or bent rotors.Inspect the brakes →
- E-bike systemConfirm the main battery charges with the correct charger, locks securely into its mount and has no case damage, swelling, corrosion or overheating marks. Power the bike on from cold, test every assist mode and ask for available battery-health and diagnostic records.Check the battery and electronics →
- SuspensionAsk when the fork and shock were last serviced. Check the stanchions for damage, look for oil at the seals, cycle both units through their travel and test the suspension pivots for play.Evaluate the suspension →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 26 checks based on 7 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2026 Jamis Defcon E2 · Electric-assist · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Triple-butted 6061 alloy, 150mm Horst Link suspension travel, 1.5 – 1 1/8” tapered head tube, 12x148mm thru-axle dropout, SR Suntour TriAir 2 2CR, UDH derailleur hanger · Fork: SR Suntour Aion 36 w/adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 160mm travel · Aluminum
Suspension
Evaluate the suspension →Archived: Fork: SR Suntour Aion 36 w/adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 160mm travel · Rear shock: SR Suntour TriAir 2 2CR
Drivetrain
Check drivetrain wear →Archived: Group: Shimano Deore, 12-speed · Shifters: Shimano Deore, 1×12-speed · Rear derailleur: Shimano Deore, 12-speed · Crankset: FSA CK-752, 34T, 160mm · Cassette: Shimano M6100, 12-speed, 10-51T · Chain: KMC X12, 12-speed
Brakes
Inspect the brakes →Archived: Brakes: TRP Slate EVO 4-piston hydraulic disc, 180mm rotors
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29 · Wheels: Stan’s No Tubes Flow D rims, Novatec D791SB 15x110mm front & D902SB 12x148mm rear hubs, stainless spokes · Front tire: Vittoria Mazza 29×2.4″ Enduro · Rear tire: Vittoria Mazza 29×2.4″ Enduro
Controls and contact points
Archived: Headset: FSA Orbit IS Integrated, 8mm cone spacer · Handlebar: Race Face Chester, 780mm x 20mm rise, 35mm diameter · Stem: Race Face Chester, 40mm extension, 35mm clamp diameter · Seatpost: KS Vantage adjustable Dropper 30.9mm, Westy 2.0 remote · Saddle: WTB Rocket
E-bike system
Check the battery and electronics →Archived: Motor: Shimano DU-EP600 · Battery: Shimano BT-EN806, 630Wh
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




