Transition Sentinel Carbon XO Youth AXS

Name: Transition Sentinel Carbon XO Youth AXS
Brand: Transition

2026 YouthMountain youth Manufacturer page

Last known price: $7,999

Prices shown first for United States
Travel: 160 / 150 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 12 30t / 10–52t
Gear range: 520%
Weight: 15.07 kg 33.2 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 143–160

Components

19 of 23 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Sentinel Carbon 150mm Not identified

Suspension

2 parts

Drivetrain

7 parts

Bottom bracket

73mm BSA Threaded Not identified
Cassette
- SRAM XS-1295 Eagle Transmission 12 speeds 10–52t
XS-1295
Chain
- SRAM X0 Eagle Transmission Flattop 12 speeds
Chain guide

ISCG05 Not identified
Crankset
- SRAM 30t
Rear derailleur
- SRAM X0 Eagle Transmission 12 speeds
Shifters
- SRAM

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Grips
- ODI
Handlebar
- OneUp
Headset
- FSA NO.57E
Saddle
- SDG
Seatpost
- Fox TRANSFER
Stem

ANVL Swage (40mm) Not identified

Sizes and geometry

1 size Open in the geometry plotter

Enter your height to highlight matching ranges.

Size XS

Table

Reach 415mm

Stack 592mm

Wheelbase 1173mm

Head angle 64.0°

Seat angle 79.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Reachmm	415
Stackmm	592
Top tube lengthmm	527
Seat tube lengthmm	360
Head tube lengthmm	100
Head tube angle	64°
Seat tube angle	79.5°
Chainstay lengthmm	436
Wheelbasemm	1173
Front centermm	737
Bottom bracket dropmm	15
Bottom bracket heightmm	340
Fork rakemm	37
Trailmm	132
Stack/reach ratio	1.43

Not published by the manufacturer: Standover height, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Bicycle weight: 15.07 kg

33.2 lb

Suspension

Suspension configuration: Full suspension
Front travel: 160 mm
Rear travel: 150 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 15.9 in
Highest gear: 82.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Dropper seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

1 measure

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Shifting

Electronic

9 of 321 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2026
Sample: 321 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.1 km/h
Highest gear: 31.6 km/h

Total gear range 520%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 15.9–82.5 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds

Differences across 2026 builds
Specification	This bicycle Transition Sentinel Carbon XO Youth AXS	Transition Sentinel Alloy Eagle 70	Transition Sentinel Alloy Eagle 90	Transition Sentinel Alloy Youth XT	Transition Sentinel Carbon Youth Deore	Transition Sentinel Carbon Eagle 90
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	15.07 kg	Not informed	Not informed	15.58 kg	15.21 kg	Not informed
Drivetrain
Largest sprocket	52	52	52	51	51	52
Lowest gear	15.9 in	16.7 in	16.7 in	16.2 in	16.2 in	16.7 in
Highest gear	82.5 in	87.0 in	87.0 in	82.5 in	82.5 in	87.0 in
Cockpit
Derailleur hanger	UDH	Not informed	Not informed	Not informed	Not informed	Not informed
Shifting	Electronic	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Fork spring	Air	Not informed	Air	Not informed	Air	Air
Wheel size	27.5″	29″	29″	27.5″	27.5″	29″