Transition Sentinel Alloy Eagle 70

Name: Transition Sentinel Alloy Eagle 70
Brand: Transition

2026 MountainEnduro Manufacturer page

Last known price: $3,999

Prices shown first for United States
Travel: 160 / 150 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 30t / 10–52t
Gear range: 520%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

Carbon 29 Not informed
Carbon Mixed Not informed
Alloy Mixed Not informed
Alloy 29 Not informed
SM 154–170
MD 164–182
LG 175–190
XL 184–200
Carbon 29 Not informed
Carbon Mixed Not informed
Alloy Mixed Not informed
Alloy 29 Not informed
SM 154–170
MD 164–182
LG 175–190
XL 184–200
Carbon 29 Not informed
Carbon Mixed Not informed
Alloy Mixed Not informed
Alloy 29 Not informed
SM 154–170
MD 164–182
LG 175–190
XL 184–200
Carbon 29 Not informed
Carbon Mixed Not informed
Alloy Mixed Not informed
Alloy 29 Not informed
SM 154–170
MD 164–182
LG 175–190
XL 184–200

Components

20 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 Alloy 150mm Not identified

Suspension

2 parts

Drivetrain

7 parts

Bottom bracket

73mm BSA Threaded Not identified
Cassette
- SRAM XS-1270 Eagle Transmission 12 speeds 10–52t
XS-1270
Chain
- SRAM Eagle 70 Transmission Flattop 12 speeds
Chain guide

ISCG05 Not identified
Crankset
- SRAM 30t
Rear derailleur
- SRAM Eagle AXS S500 12 speeds
Shifters
- SRAM

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Sizes and geometry

32 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size Carbon Mixed

Table

Reach 455mm

Stack 621mm

Wheelbase 1237mm

Head angle 64.0°

Seat angle 78.7°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 32 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	430	455	480	505	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Stackmm	615	621	633	642	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Top tube lengthmm	549	577	605	632	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Seat tube lengthmm	360	390	430	460	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Head tube lengthmm	100	110	120	130	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Head tube angle	64°	64°	64°	64°	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Seat tube angle	79.3°	78.7°	78.3°	77.9°	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Chainstay lengthmm	442	442	442	448	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Wheelbasemm	1208	1237	1267	1302	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Front centermm	767	796	826	855	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Bottom bracket dropmm	25	25	25	25	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Bottom bracket heightmm	350	350	350	350	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Standover heightmm	690	690	695	705	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Fork rakemm	44	45	44	44	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Trailmm	134	133	134	134	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Stack/reach ratio	1.43	1.37	1.32	1.27	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Not published by the manufacturer: 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: Aluminum

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: 16.7 in
Highest gear: 87.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

3 measures

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

Front travel

160 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2026
Sample: 1,332 bicycles with this information
Coverage: 95.2% of the class

Rear travel

150 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2026
Sample: 1,005 bicycles with this information
Coverage: 71.8% of the class

Shifting

Mechanical

454 of 1,399 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2026
Sample: 1,399 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.4 km/h
Highest gear: 33.3 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: 16.7–87.0 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 Alloy Eagle 70	Transition Sentinel Alloy Eagle 90	Transition Sentinel Alloy Youth XT	Transition Sentinel Carbon Youth Deore	Transition Sentinel Carbon Eagle 90	Transition Sentinel Carbon Eagle 90 Youth
Frame
Frame material	Aluminum	Aluminum	Aluminum	Carbon	Carbon	Carbon
Bicycle weight	Not informed	Not informed	15.58 kg	15.21 kg	Not informed	Not informed
Drivetrain
Largest sprocket	52	52	51	51	52	52
Lowest gear	16.7 in	16.7 in	16.2 in	16.2 in	16.7 in	15.9 in
Highest gear	87.0 in	87.0 in	82.5 in	82.5 in	87.0 in	82.5 in
Other specifications
Wheel size	29″	29″	27.5″	27.5″	29″	27.5″
Fork spring	Not informed	Air	Not informed	Air	Air	Air