Velopedia Bicycle Archive
2026 Transition Sentinel Carbon Frameset
Original manufacturer specifications including 29" or Mixed wheels, geometry for 8 published sizes.
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What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $3,799.00
- Sizes
- S, M, L, XL
- Colors
- Silver Mist, Desert Dusk
- Geometry
- 8 manufacturer sizes · Geometry context
- Record coverage
- 4 preserved details · 2 archived images · original MSRP · preserved geometry
- Archive ID
- 900001565
Frameset
| Frame Construction | Sentinel Carbon 150mm |
|---|---|
| Frame Material | Carbon Fiber |
| Rear Shock | Fox Float X2 Factory(205x60mm) |
Wheels & Tires
| Wheel Size | 29" or Mixed |
|---|
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 | SM · Carbon 29 | MD · Carbon 29 | LG · Carbon 29 | XL · Carbon 29 | SM · Carbon Mixed | MD · Carbon Mixed | LG · Carbon Mixed | XL · Carbon Mixed |
|---|---|---|---|---|---|---|---|---|
| Seat tube | 360 mm | 390 mm | 430 mm | 460 mm | 360 mm | 390 mm | 430 mm | 460 mm |
| Effective top tube | 549 mm | 577 mm | 605 mm | 632 mm | 549 mm | 577 mm | 605 mm | 632 mm |
| Head tube | 100 mm | 110 mm | 120 mm | 130 mm | 100 mm | 110 mm | 120 mm | 130 mm |
| Head-tube angle | 64° | 64° | 64° | 64° | 63.6° | 63.6° | 63.6° | 63.6° |
| Chainstay / rear center | 442 mm | 442 mm | 442 mm | 448 mm | 440 mm | 440 mm | 440 mm | 446 mm |
| Wheelbase | 1208 mm | 1237 mm | 1267 mm | 1302 mm | 1208 mm | 1237 mm | 1269 mm | 1302 mm |
| Bottom-bracket drop | 25 mm | 25 mm | 25 mm | 25 mm | 31 mm | 31 mm | 31 mm | 31 mm |
| Reach | 430 mm | 455 mm | 480 mm | 505 mm | 426 mm | 451 mm | 476 mm | 501 mm |
| Stack | 615 mm | 621 mm | 633 mm | 642 mm | 618 mm | 624 mm | 636 mm | 646 mm |
| Standover height | 690 mm | 690 mm | 695 mm | 705 mm | 690 mm | 690 mm | 695 mm | 705 mm |
Geometry source: Transition first-party SBG geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
SM geometry
Carbon 29
Archive context: The chainstay of 442 mm sits toward the longer rear-center end. Its wheelbase of 1208 mm sits somewhat longer than typical. Its bottom-bracket drop of 25 mm sits somewhat shallower than typical.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.MD geometry
Carbon 29
Archive context: The chainstay of 442 mm sits toward the longer rear-center end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. Its wheelbase of 1237 mm sits somewhat longer than typical.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.LG geometry
Carbon 29
Archive context: Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. The chainstay of 442 mm sits somewhat longer than typical. Its wheelbase of 1267 mm sits somewhat longer than typical.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.XL geometry
Carbon 29
Archive context: The chainstay of 448 mm sits toward the longer rear-center end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. Its wheelbase of 1302 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.SM · Carbon Mixed geometry
Archive context: Its reach of 426 mm sits toward the shorter end. The head angle of 63.6° sits toward the slacker end. The chainstay of 440 mm sits somewhat longer than typical.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.MD · Carbon Mixed geometry
Archive context: Its reach of 451 mm sits toward the shorter end. The head angle of 63.6° sits toward the slacker end. The chainstay of 440 mm sits somewhat longer than typical.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.LG · Carbon Mixed geometry
Archive context: Its reach of 476 mm sits toward the shorter end. The head angle of 63.6° sits toward the slacker end. Its stack of 636 mm sits somewhat lower than typical.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.XL · Carbon Mixed geometry
Archive context: Its reach of 501 mm sits toward the shorter end. Its stack of 646 mm sits toward the lower end. The head angle of 63.6° sits toward the slacker end.
Compared with 23 distinct mountain geometries in the XXL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Used-frameset inspection
If you’re buying this frameset used
Before buying: confirm the serial number and exact model, inspect frame and fork alignment, and inventory every included axle, hanger, clamp, headset part, cable guide and proprietary fitting.
Inspect the frame and fork →- 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 →
- SuspensionAsk when the rear shock was last serviced. Check the shaft and seals for damage or oil, cycle the shock through its travel and test every suspension pivot for play.Evaluate the suspension →
- Included hardwareInventory every axle, hanger, clamp, headset part, cable guide, frame plug and proprietary fitting included with the frameset. Confirm replacement availability before treating a missing small part as insignificant.
Used-frameset inspection checklist 16 universal checks for a record with limited component data Open checklistClose checklist
The archived record does not contain enough component detail for a fully specification-informed frameset checklist. Use these universal checks on the frameset in front of you, inventory every included part and confirm exact interfaces before choosing components.
Identity and fit
Follow the full used-bike inspection order →Archived: 2026 Transition Sentinel Carbon Frameset · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Sentinel Carbon 150mm
Suspension
Evaluate the suspension →Archived: Rear shock: Fox Float X2 Factory(205x60mm)
Alignment
Inspect the frame and fork →Frame interfaces
Inspect the bottom bracket and shell →Before accepting the frameset
Inspect the frame and fork →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
Have you owned this bike?Help document firsthand fit, ride and maintenance details that may no longer be available.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.