
Velopedia Bicycle Archive
2026 Jamis Faultline A1 MPX
Mountain bicycle from the Velopedia specification archive.
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What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $3,699.95
- Sizes
- S/15.5″, M/17″, L/19″, XL/21″
- Colors
- Gloss Black
- Weight
- 33 lbs
- Geometry
- 4 manufacturer sizes · Geometry context
- Record coverage
- 23 preserved details · 3 archived images · original MSRP · preserved geometry
- Archive ID
- 900001533
Frameset
| Frame Construction | Triple-butted 6061 alloy, 125mm suspension travel, 1.5 – 1 1/8” tapered head tube, asymmetrical chainstays w/12x148mm thru-axle dropout, internal dropper post routing, ISCG05 chainguide mount, Fox Float DPS Performance Series EVOL shock w/3-position compression, UDH derailleur hanger |
|---|---|
| Frame Material | Aluminum |
| Fork | Fox 34 Rhythm Series Float 29″ w/ sweep adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 130mm travel |
| Fork Material | Aluminum |
| Rear Shock | Fox Float DPS Performance Series EVOL shock w/3-position compression |
Drivetrain
| Component Group | SRAM Eagle 90, 12-speed |
|---|---|
| Shifters | SRAM Eagle 90, 1×12-speed |
| Rear Derailleur | SRAM Eagle 90, 12-speed |
| Crankset | SRAM Eagle 90, 32T, 170mm |
| Bottom Bracket | SRAM |
| Cassette | SRAM 1275, 12-speed, 10-52T |
| Chain | SRAM T-Type, 12-speed |
Brakes
| Brakes | SRAM DB8 4-piston hydraulic disc, 180mm rotors |
|---|
Cockpit & Contact Points
| Headset | FSA Orbit 1.5 Zero-Stack internal cup, 8mm cone spacer |
|---|---|
| Handlebar | Race Face Ride , 35 x 780mm |
| Stem | Race Face Ride, 50mm |
| Saddle | WTB Volt |
| Seatpost | KS Vantage Adjustable Travel Dropper 110-140mm travel Length: (S), 140-170mm travel Length: (M/L), 170-200mm travel Length: (XL), 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 Agarro 29×2.4″ Trail |
| Rear Tire | Vittoria Agarro 29×2.4″ Trail |
| Wheel Size | 29 |
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/15.5″ | M/17″ | L/19″ | XL/21″ |
|---|---|---|---|---|
| Effective top tube | 575 mm | 600 mm | 618 mm | 635 mm |
| Head tube | 105 mm | 110 mm | 120 mm | 130 mm |
| Head-tube angle | 66° | 66° | 66° | 66° |
| Seat-tube angle | 77° | 77° | 77° | 77° |
| Chainstay / rear center | 445 mm | 445 mm | 445 mm | 445 mm |
| Wheelbase | 1171 mm | 1208 mm | 1227 mm | 1241 mm |
| Bottom-bracket drop | 35 mm | 35 mm | 35 mm | 35 mm |
| Reach | 435 mm | 460 mm | 480 mm | 500 mm |
| Stack | 606 mm | 611 mm | 620 mm | 645 mm |
| Standover height | 716 mm | 716 mm | 717 mm | 717 mm |
Geometry source: Jamis first-party geometry table (2026 GEO - FAULTLINE® MPX) ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
S/15.5″ geometry
Archive context: The chainstay of 445 mm sits toward the longer rear-center end. Its reach of 435 mm sits somewhat longer than typical. The seat angle of 77° sits somewhat steeper than typical.
Compared with 168 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.M/17″ geometry
Archive context: The chainstay of 445 mm sits toward the longer rear-center end. Its reach of 460 mm sits somewhat longer than typical. The seat angle of 77° sits somewhat steeper than typical.
Compared with 171 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.L/19″ geometry
Archive context: The chainstay of 445 mm sits toward the longer rear-center end. Its stack of 620 mm sits somewhat lower than typical. The seat angle of 77° sits somewhat steeper than typical.
Compared with 166 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.XL/21″ geometry
Archive context: The chainstay of 445 mm sits somewhat longer than typical. Its wheelbase of 1241 mm sits somewhat shorter than typical. The head angle of 66° sits somewhat steeper than typical.
Compared with 145 distinct mountain 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 →
- 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 →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 12-speed system.Check drivetrain wear →
- 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 22 checks based on 6 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 Faultline A1 MPX · Mountain · Published sizes: S/15.5″, M/17″, L/19″, XL/21″
Frame and fork
Inspect the frame and fork →Archived: Frame: Aluminum · Fork: Fox 34 Rhythm Series Float 29″ w/ sweep adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 130mm travel · Aluminum
Suspension
Evaluate the suspension →Archived: Fork: Fox 34 Rhythm Series Float 29″ w/ sweep adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 130mm travel · Rear shock: Fox Float DPS Performance Series EVOL shock w/3-position compression
Drivetrain
Check drivetrain wear →Archived: Group: SRAM Eagle 90, 12-speed · Shifters: SRAM Eagle 90, 1×12-speed · Rear derailleur: SRAM Eagle 90, 12-speed · Crankset: SRAM Eagle 90, 32T, 170mm · Bottom bracket: SRAM · Cassette: SRAM 1275, 12-speed, 10-52T · Chain: SRAM T-Type, 12-speed
Brakes
Inspect the brakes →Archived: Brakes: SRAM DB8 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 Agarro 29×2.4″ Trail · Rear tire: Vittoria Agarro 29×2.4″ Trail
Controls and contact points
Archived: Headset: FSA Orbit 1.5 Zero-Stack internal cup, 8mm cone spacer · Handlebar: Race Face Ride , 35 x 780mm · Stem: Race Face Ride, 50mm · Seatpost: KS Vantage Adjustable Travel Dropper 110-140mm travel Length: (S), 140-170mm travel Length: (M/L), 170-200mm travel Length: (XL), Westy 2.0 remote · Saddle: WTB Volt
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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Gallery
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




