Transition Sentinel Alloy NX

Name: Transition Sentinel Alloy NX
Brand: Transition

2024 MountainEnduro Manufacturer page

Last known price: $4,099

Prices shown first for United States
Travel: 160 / 150 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 30t / 11–50t
Gear range: 455%
Weight: 16.24 kg 35.8 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 154–170
MD 164–182
LG 175–190
XL 184–200
XXL 190–207

Components

20 of 22 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

6 parts

Bottom bracket

73mm BSA Threaded Not identified
Cassette
- SRAM PG-1230 Eagle 12 speeds 11–50t
PG-1230
Chain
- SRAM NX Eagle 12 speeds
Crankset
- SRAM X1-Carbon DUB 11 speeds 30t
Rear derailleur
- SRAM NX Eagle 12 speeds
Shifters
- SRAM NX Eagle Trigger 12 speeds

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size LG

Table

Reach 476mm

Stack 631mm

Wheelbase 1263mm

Head angle 63.6°

Seat angle 76.9°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	420	450	476	501	521
Stackmm	613	622	631	640	649
Top tube lengthmm	552	585	613	641	665
Seat tube lengthmm	350	390	430	460	490
Head tube lengthmm	100	110	120	130	140
Head tube angle	63.6°	63.6°	63.6°	63.6°	63.6°
Seat tube angle	78.2°	77.5°	76.9°	76.4°	76°
Chainstay lengthmm	440	440	440	440	440
Wheelbasemm	1199	1233	1263	1292	1316
Front centermm	761	794	824	853	877
Bottom bracket dropmm	29	29	29	29	29
Bottom bracket heightmm	346	346	346	347	347
Standover heightmm	671	688	700	712	722
Fork rakemm	43	43	43	43	43
Trailmm	136	137	137	137	138
Stack/reach ratio	1.46	1.38	1.33	1.28	1.25

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
Bicycle weight: 16.24 kg

35.8 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: 11
Largest sprocket: 50
Lowest gear: 17.4 in
Highest gear: 79.1 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
Fork spring: Air
Tire clearance: Maximum tire width: 2.6″
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: 2024
Sample: 1,578 bicycles with this information
Coverage: 98.0% of the class

Rear travel

150 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2024
Sample: 1,329 bicycles with this information
Coverage: 82.5% of the class

Shifting

Mechanical

439 of 1,609 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2024
Sample: 1,609 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.7 km/h
Highest gear: 30.3 km/h

Total gear range 455%

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: 17.4–79.1 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 2024 builds
Specification	This bicycle Transition Sentinel Alloy NX	Transition Sentinel Alloy GX	Transition Sentinel Carbon AXS	Transition Sentinel Carbon GX
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	16.24 kg	15.38 kg	14.33 kg	14.38 kg
Drivetrain
Smallest sprocket	11	10	10	10
Largest sprocket	50	52	52	52
Lowest gear	17.4 in	16.7 in	16.7 in	16.7 in
Highest gear	79.1 in	87.0 in	87.0 in	87.0 in
Cockpit
Shifting	Mechanical	Mechanical	Electronic	Mechanical