Velopedia Bicycle Archive
2026 Transition Sentinel Carbon Eagle 90 Youth
Original manufacturer specifications including 27.5" wheels, geometry for 1 published size.
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What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $6,699.00
- Sizes
- XS
- Colors
- Deep Purple, Glacier White, Graphite Grey
- Geometry
- 1 manufacturer size · Geometry context
- Record coverage
- 21 preserved details · 3 archived images · original MSRP · preserved geometry
- Archive ID
- 900001575
Frameset
| Frame Construction | Sentinel Carbon 150mm |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | RockShox Lyrik Ultimate (160mm) |
| Rear Shock | RockShox Super Deluxe Ultimate (205x60mm) |
Drivetrain
| Shifters | SRAM Eagle 90 MMX |
|---|---|
| Rear Derailleur | SRAM Eagle 90 |
| Crankset | SRAM Eagle 90 DUB (30t/165mm) |
| Cassette | SRAM XS 1275 T-Type (10-52t) |
| Chain | SRAM GX Eagle Transmission |
Brakes
| Brakes | SRAM Maven Bronze; Rotors: SRAM Centerline (200mm) |
|---|
Cockpit & Contact Points
| Headset | FSA No.57E |
|---|---|
| Handlebar | ANVL Mandrel Alloy 35 (800x20mm) |
| Stem | ANVL Swage (40mm) |
| Saddle | SDG Bel Air 3 |
| Seatpost | OneUp Dropper Post(120mm) |
Wheels & Tires
| Hubs | DT Swiss 370 Ratchet LN |
|---|---|
| Rims | DT Swiss M 1900 Spline 30 |
| Spokes | DT Swiss Champion |
| Front Tire | Maxxis Assegai 3C EXO+ (2.5) |
| Rear Tire | Maxxis Minion DHRII 3C EXO+ (2.4) |
| 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.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XS geometry Parts & serviceability
Find replacement parts
SRAM GX Eagle Transmission
Interpreted as SRAM GX · 12-speed Component family — verify exact version
SRAM XS 1275 T-Type (10-52t)
Named component · published drivetrain speed — verify exact version
Maxxis Assegai 3C EXO+ (2.5)
Named tire · verify the exact width
Before ordering: Confirm the exact tire width before ordering.
More qualified parts (6)
Maxxis Minion DHRII 3C EXO+ (2.4)
Named tire · verify the exact width
Before ordering: Confirm the exact tire width before ordering.
SRAM Eagle 90
Interpreted as SRAM Eagle 90 · 12-speed Named component · published drivetrain speed — verify exact version
SRAM Eagle 90 MMX
Interpreted as SRAM Eagle 90 · 12-speed Named component · published drivetrain speed — verify exact version
OneUp Dropper Post(120mm)
Dropper post identified — verify travel, routing and insertion depth
FSA No.57E
Exact archived model
DT Swiss M 1900 Spline 30
Named archived component — verify dimensions
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 →- 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 →
- DrivetrainShift through the full range under light load, measure chain wear and inspect the cassette or freewheel teeth. Skipping or hesitation can indicate wear, poor adjustment or mismatched parts.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 Transition Sentinel Carbon Eagle 90 Youth · Mountain · Published sizes: XS
Frame and fork
Inspect the frame and fork →Archived: Frame: Sentinel Carbon 150mm · Fork: RockShox Lyrik Ultimate (160mm)
Suspension
Evaluate the suspension →Archived: Fork: RockShox Lyrik Ultimate (160mm) · Rear shock: RockShox Super Deluxe Ultimate (205x60mm)
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM Eagle 90 MMX · Rear derailleur: SRAM Eagle 90 · Crankset: SRAM Eagle 90 DUB (30t/165mm) · Cassette: SRAM XS 1275 T-Type (10-52t) · Chain: SRAM GX Eagle Transmission
Brakes
Inspect the brakes →Archived: Brakes: SRAM Maven Bronze; Rotors: SRAM Centerline (200mm)
Wheels and tires
Check wheels and tires →Archived: Wheel size: 27.5" · Rims: DT Swiss M 1900 Spline 30 · Hubs: DT Swiss 370 Ratchet LN · Front tire: Maxxis Assegai 3C EXO+ (2.5) · Rear tire: Maxxis Minion DHRII 3C EXO+ (2.4)
Controls and contact points
Archived: Headset: FSA No.57E · Handlebar: ANVL Mandrel Alloy 35 (800x20mm) · Stem: ANVL Swage (40mm) · Seatpost: OneUp Dropper Post(120mm) · Saddle: SDG Bel Air 3
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.