Velopedia Bicycle Archive
2026 Transition Sentinel Alloy Frameset Youth
Original manufacturer specifications including 27.5" wheels, 9.91 lbs / 4.50 kg published weight, geometry for 1 published size.
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What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $2,199.00
- Sizes
- XS
- Colors
- Graphite Grey
- Weight
- 9.91 lbs / 4.50 kg
- Geometry
- 1 manufacturer size · Geometry context
- Record coverage
- 5 preserved details · archived image · original MSRP · preserved geometry
- Archive ID
- 900001571
Frameset
| Frame Construction | Sentinel Alloy 150mm |
|---|---|
| Frame Material | Aluminum |
| Rear Shock | RockShox Super Deluxe Ultimate (205x60mm) |
Wheels & Tires
| Wheel Size | 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 |
|---|---|
| Seat tube | 360 mm |
| Effective top tube | 527 mm |
| Head tube | 100 mm |
| Head-tube angle | 64° |
| Chainstay / rear center | 436 mm |
| Wheelbase | 1173 mm |
| Bottom-bracket drop | 15 mm |
| Reach | 415 mm |
| Stack | 592 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
XS geometry
Archive context: Its bottom-bracket drop of 15 mm sits toward the shallower-drop end. The head angle of 64° sits toward the slacker end. Its wheelbase of 1173 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.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 →- 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 →
- 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 Alloy Frameset Youth · Mountain · Published sizes: XS
Frame and fork
Inspect the frame and fork →Archived: Frame: Sentinel Alloy 150mm
Suspension
Evaluate the suspension →Archived: Rear shock: RockShox Super Deluxe Ultimate (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.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.