
Velopedia Bicycle Archive
2026 Pivot Firebird Expert XT Di2 | MX
Original manufacturer specifications including Expert XT Di2 | MX drivetrain, 29"; 27.5" wheels, geometry for 18 published sizes.
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What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $7,799.00
- Sizes
- XS, S, M, L, XL
- Colors
- Yolo, White Gold
- Geometry
- 18 manufacturer sizes · Geometry context
- Record coverage
- 18 preserved details · archived image · original MSRP · preserved geometry
- Archive ID
- 900001658
Frameset
| Frame Construction | Firebird — Ultra-light Hollow Core carbon frame |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | Fox Performance 38 29", 44mm offset, GRIP - 170mm |
| Rear Shock | 2025 Fox Factory Float X2 |
Drivetrain
| Component Group | Expert XT Di2 | MX |
|---|---|
| Shifters | Shimano XT Di2 M8200 ISPEC EV 12-Speed |
| Rear Derailleur | Shimano XT Di2 M8200 SGS 12-Speed |
| Crankset | Race Face Æffect R 32t |
| Cassette | Shimano XT M8200 10-51t |
| Chain | Shimano CN-M8100 12-Speed |
Brakes
| Brakes | Shimano XT M8220 4-piston; Rotors: Shimano RT-86 6-bolt - 203mm Shimano RT-86 6-bolt- 203mm |
|---|
Cockpit & Contact Points
| Headset | Pivot Precision Sealed Cartridge |
|---|---|
| Handlebar | Phoenix Team Carbon - 20mm Rise 760mm(XS), 20mm Rise 780mm(SM), 35mm Rise 780mm(MD-XL) |
| Stem | Phoenix Team Enduro V2- 32mm(XS), 40mm(SM-LG), 50mm(XL) |
| Saddle | Phoenix WTB Ride High Tail Trail (XS, SM), Phoenix WTB Ride Volt (Medium Width) (MD-XL) |
| Seatpost | JD/Pivot YSP23GLS |
Wheels & Tires
| Wheels | DT Swiss M1900 w/ DT Swiss 370 hub, 30mm - Mixed or 29" 15x110 F/12x157 R |
|---|---|
| Wheel Size | 29"; 27.5" |
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 | XS · MX · High | SM · MX · High | MD · MX · High | LG · MX · High | XL · MX · High | XS · MX · Low | SM · MX · Low | MD · MX · Low | LG · MX · Low | XL · MX · Low | SM · 29" · High | MD · 29" · High | LG · 29" · High | XL · 29" · High | SM · 29" · Low | MD · 29" · Low | LG · 29" · Low | XL · 29" · Low |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seat tube | 365 mm | 385 mm | 415 mm | 440 mm | 475 mm | 365 mm | 385 mm | 415 mm | 440 mm | 475 mm | 385 mm | 415 mm | 440 mm | 475 mm | 385 mm | 415 mm | 440 mm | 475 mm |
| Top tube | 558 mm | 596 mm | 622 mm | 635 mm | 657 mm | 559 mm | 597 mm | 623 mm | 636 mm | 658 mm | 594 mm | 599 mm | 633 mm | 655 mm | 595 mm | 620 mm | 634 mm | 656 mm |
| Head tube | 85 mm | 95 mm | 108 mm | 118 mm | 128 mm | 85 mm | 95 mm | 108 mm | 118 mm | 128 mm | 95 mm | 108 mm | 118 mm | 128 mm | 95 mm | 108 mm | 118 mm | 128 mm |
| Head-tube angle | 63.8° | 63.4° | 63.4° | 63.4° | 63.4° | 63.4° | 63.1° | 63.1° | 63.1° | 63.1° | 64.2° | 64.2° | 64.2° | 64.2° | 63.8° | 63.8° | 63.8° | 63.8° |
| Seat-tube angle | 77.6° | 77° | 77° | 77° | 77° | 76.8° | 76.2° | 76.2° | 76.2° | 76.2° | 77.75° | 77.75° | 77.75° | 77.75° | 77° | 77° | 77° | 77° |
| Chainstay / rear center | 430 / 438 | 430 / 438 | 432 / 440 | 434 / 442 | 437 / 445 | 431 / 439 | 431 / 439 | 433 / 441 | 435 / 443 | 438 / 446 | 430 / 438 | 432 / 440 | 434 / 442 | 437 / 445 | 431 / 439 | 433 / 441 | 435 / 443 | 438 / 446 |
| Wheelbase | 1179 / 1187 | 1217 / 1223 | 1248 / 1256 | 1271 / 1279 | 1299 / 1306 | 1180 / 1188 | 1218 / 1225 | 1249 / 1257 | 1272 / 1280 | 1300 / 1308 | 1217 / 1225 | 1248 / 1256 | 1271 / 1279 | 1299 / 1306 | 1218 / 1226 | 1249 / 1257 | 1272 / 1280 | 1300 / 1307 |
| Bottom-bracket drop | 10 mm | 13 mm | 13 mm | 13 mm | 13 mm | 15 mm | 18 mm | 18 mm | 18 mm | 18 mm | 17 mm | 17 mm | 17 mm | 17 mm | 25 mm | 25 mm | 25 mm | 25 mm |
| Bottom-bracket height | 347 mm | 344 mm | 344 mm | 344 mm | 344 mm | 342 mm | 340 mm | 340 mm | 340 mm | 340 mm | 354 mm | 354 mm | 354 mm | 354 mm | 349 mm | 349 mm | 349 mm | 349 mm |
| Reach | 410 mm | 440 mm | 463 mm | 480 mm | 500 mm | 405 mm | 436 mm | 459 mm | 476 mm | 496 mm | 449 mm | 472 mm | 489 mm | 509 mm | 445 mm | 468 mm | 485 mm | 505 mm |
| Stack | 615 mm | 625 mm | 637 mm | 646 mm | 655 mm | 618 mm | 628 mm | 640 mm | 649 mm | 658 mm | 619 mm | 630 mm | 639 mm | 648 mm | 622 mm | 633 mm | 642 mm | 651 mm |
| Standover height | 678 mm | 682 mm | 687 mm | 708 mm | 712 mm | 675 mm | 677 mm | 681 mm | 703 mm | 708 mm | 692 mm | 697 mm | 719 mm | 720 mm | 687 mm | 692 mm | 713 mm | 716 mm |
| Wheel size | Mx | Mx | Mx | Mx | Mx | Mx | Mx | Mx | Mx | Mx | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" |
Geometry source: Pivot first-party headless CMS geometry ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
The manufacturer publishes more than one geometry configuration. Velopedia analyzes each labeled state separately while treating them as one chassis in archive comparisons.
XS geometry
Archive context: Its bottom-bracket drop of 10 mm sits toward the shallower-drop end. The seat angle of 77.6° sits toward the steeper end. The head angle of 63.8° sits toward the slacker end.
Compared with 56 distinct mountain geometries in the XS-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 10 mm sits toward the shallower-drop end. The seat angle of 77.6° sits toward the steeper end. The head angle of 63.8° sits toward the slacker end.
Compared with 56 distinct mountain geometries in the XS-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: The head angle of 63.4° sits toward the slacker end. Its stack of 618 mm sits toward the taller end. Its bottom-bracket drop of 15 mm sits toward the shallower-drop end.
Compared with 56 distinct mountain geometries in the XS-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: The head angle of 63.4° sits toward the slacker end. Its stack of 618 mm sits toward the taller end. Its wheelbase of 1188 mm sits toward the longer end.
Compared with 56 distinct mountain geometries in the XS-equivalent size cohort from model years 2024–2027 in the Velopedia archive.SM geometry
Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. The head angle of 63.4° sits toward the slacker end. Its wheelbase of 1217 mm sits toward the longer end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. The head angle of 63.4° sits toward the slacker end. Its wheelbase of 1223 mm sits toward the longer end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: The head angle of 63.1° sits toward the slacker end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end. Its stack of 628 mm sits toward the taller end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: The head angle of 63.1° sits toward the slacker end. Its wheelbase of 1225 mm sits toward the longer end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its reach of 449 mm sits toward the longer end. Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. The seat angle of 77.8° sits toward the steeper end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its reach of 449 mm sits toward the longer end. Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. Its wheelbase of 1225 mm sits toward the longer end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its reach of 445 mm sits toward the longer end. Its wheelbase of 1218 mm sits toward the longer end. The head angle of 63.8° sits toward the slacker end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its wheelbase of 1226 mm sits toward the longer end. Its reach of 445 mm sits toward the longer end. The head angle of 63.8° sits toward the slacker end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.MD geometry
Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. Its stack of 637 mm sits toward the taller end. The head angle of 63.4° sits toward the slacker end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. Its wheelbase of 1256 mm sits toward the longer end. Its stack of 637 mm sits toward the taller end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its stack of 640 mm sits toward the taller end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end. The head angle of 63.1° sits toward the slacker end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its stack of 640 mm sits toward the taller end. Its wheelbase of 1257 mm sits toward the longer end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. Its reach of 472 mm sits toward the longer end. The seat angle of 77.8° sits toward the steeper end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. Its reach of 472 mm sits toward the longer end. Its wheelbase of 1256 mm sits toward the longer end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its reach of 468 mm sits toward the longer end. Its wheelbase of 1249 mm sits toward the longer end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its wheelbase of 1257 mm sits toward the longer end. Its reach of 468 mm sits toward the longer end. The chainstay of 441 mm sits toward the longer rear-center end.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.LG geometry
Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. Its stack of 646 mm sits toward the taller end. The head angle of 63.4° sits toward the slacker end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. Its stack of 646 mm sits toward the taller end. The head angle of 63.4° sits toward the slacker end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its stack of 649 mm sits toward the taller end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end. The head angle of 63.1° sits toward the slacker end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its stack of 649 mm sits toward the taller end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end. The head angle of 63.1° sits toward the slacker end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. The seat angle of 77.8° sits toward the steeper end. Its reach of 489 mm sits toward the longer end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. The seat angle of 77.8° sits toward the steeper end. Its reach of 489 mm sits toward the longer end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its stack of 642 mm sits toward the taller end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. Its wheelbase of 1272 mm sits toward the longer end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its wheelbase of 1280 mm sits toward the longer end. Its stack of 642 mm sits toward the taller end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.XL geometry
Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. The head angle of 63.4° sits toward the slacker end. Its stack of 655 mm sits toward the taller end.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 13 mm sits toward the shallower-drop end. The head angle of 63.4° sits toward the slacker end. Its stack of 655 mm sits toward the taller end.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its stack of 658 mm sits toward the taller end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end. The head angle of 63.1° sits toward the slacker end.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its stack of 658 mm sits toward the taller end. Its bottom-bracket drop of 18 mm sits toward the shallower-drop end. The head angle of 63.1° sits toward the slacker end.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. The seat angle of 77.8° sits toward the steeper end. Its wheelbase of 1299 mm sits somewhat longer than typical.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 17 mm sits toward the shallower-drop end. The seat angle of 77.8° sits toward the steeper end. Its wheelbase of 1306 mm sits toward the longer end.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. Its stack of 651 mm sits somewhat taller than typical. The head angle of 63.8° sits somewhat slacker than typical.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. The chainstay of 446 mm sits toward the longer rear-center end. Its wheelbase of 1307 mm sits toward the longer end.
Compared with 153 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 (2)
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. 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 →- FrameInspect the frame in bright light, especially around the head tube, bottom bracket, chainstays and clamped areas. Look for cracks, ripples, crushed sections or signs of a previous impact.Inspect the frame and fork →
- BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.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 →
- DrivetrainConfirm every shift-system battery charges, every shift control works and the derailleur moves cleanly across the cassette. Make sure the matching shift-system charger is included, then measure chain wear and inspect the cassette teeth.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 Pivot Firebird Expert XT Di2 | MX · Mountain · Published sizes: XS, S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Firebird — Ultra-light Hollow Core carbon frame · Fork: Fox Performance 38 29", 44mm offset, GRIP - 170mm
Suspension
Evaluate the suspension →Archived: Fork: Fox Performance 38 29", 44mm offset, GRIP - 170mm · Rear shock: 2025 Fox Factory Float X2
Drivetrain
Check drivetrain wear →Archived: Group: Expert XT Di2 | MX · Shifters: Shimano XT Di2 M8200 ISPEC EV 12-Speed · Rear derailleur: Shimano XT Di2 M8200 SGS 12-Speed · Crankset: Race Face Æffect R 32t · Cassette: Shimano XT M8200 10-51t · Chain: Shimano CN-M8100 12-Speed
Brakes
Inspect the brakes →Archived: Brakes: Shimano XT M8220 4-piston; Rotors: Shimano RT-86 6-bolt - 203mm Shimano RT-86 6-bolt- 203mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29"; 27.5" · Wheels: DT Swiss M1900 w/ DT Swiss 370 hub, 30mm - Mixed or 29" 15x110 F/12x157 R
Controls and contact points
Archived: Headset: Pivot Precision Sealed Cartridge · Handlebar: Phoenix Team Carbon - 20mm Rise 760mm(XS), 20mm Rise 780mm(SM), 35mm Rise 780mm(MD-XL) · Stem: Phoenix Team Enduro V2- 32mm(XS), 40mm(SM-LG), 50mm(XL) · Seatpost: JD/PIVOT YSP23GLS · Saddle: Phoenix WTB Ride High Tail Trail (XS, SM), Phoenix WTB Ride Volt (Medium Width) (MD-XL)
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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