Nukeproof Reactor Alloy 290 - Sram Eagle 90

2025 MountainTrail Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €4,499 Last known price
Travel: 150 / 140 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 32t / 10–52t
Gear range: 520%
Weight: 15.17 kg 33.4 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 159–169
MD 167–177
LG 175–185
XL 183–193
XXL 191–201

Components

17 of 20 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

Nukeproof Reactor V2 290 Alloy, 140mm Travel, custom triple butted hydro-formed tube set for front triangle and chain stays, UD woven carbon fibre Seat stays, internal cable routing, ISCG 05 mounts, Max Bearings, Threaded 73mm BB, Boost 148mm rear ax Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

BSA, 73mm, threaded Not identified
Cassette
- SRAM XS-1270 Eagle Transmission 12 speeds
XS-1270
Chain
- SRAM GX
Crankset
- SRAM 32t
Rear derailleur
- SRAM Eagle AXS S500 12 speeds
Shifters
- SRAM

Brakes

2 parts

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size LG

Table

Reach 480mm

Stack 638mm

Wheelbase 1257mm

Head angle 64.5°

Seat angle 77.0°

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
Frame
Reachmm	435	460	480	500	520
Stackmm	620.24	629.26	638.29	647.31	656.34
Top tube lengthmm	578.2	605.28	621.5	643.51	665.51
Seat tube lengthmm	380	410	440	470	500
Head tube lengthmm	100	110	120	130	140
Head tube angle	64.5°	64.5°	64.5°	64.5°	64.5°
Seat tube angle	77°	77°	77°	77°	77°
Chainstay lengthmm	440	440	445	445	445
Wheelbasemm	1198.8	1228.07	1257.38	1281.68	1305.99
Front centermm	758.8	788.07	812.38	836.68	860.99
Bottom bracket dropmm	-39	-39	-39	-39	-39
Bottom bracket heightmm	330	330	330	330	330
Standover heightmm	745	750	755	760	765
Fork rakemm	42	42	42	42	42
Trailmm	132	132	132	132	132
Stack/reach ratio	1.43	1.37	1.33	1.30	1.26
Suspension and parts
Front travelmm	150	150	150	150	150

Not published by the manufacturer: 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: 15.17 kg

33.4 lb

Suspension

Suspension configuration: Full suspension
Front travel: 150 mm
Rear travel: 140 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 17.9 in
Highest gear: 92.8 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 width: 2.4″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

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

Front travel

150 mm

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,810 bicycles with this information
Coverage: 97.5% of the class

Lowest gear

17.9 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Highest gear

92.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Shifting

Mechanical

388 of 1,849 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,849 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.8 km/h
Highest gear: 35.5 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: 17.9–92.8 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2025
Lowest gear: 1384 bicycles with this information, 74.6% of the class
Highest gear: 1384 bicycles with this information, 74.6% of the class

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 2025 builds

Differences across 2025 builds
Specification	This bicycle Nukeproof Reactor Alloy 290 - Sram Eagle 90	Nukeproof Reactor Carbon 290 SRAM Transmission GX
Frame
Frame material	Aluminum	Carbon
Bicycle weight	15.17 kg	14.11 kg
Drivetrain
Smallest chainring	32	30
Largest chainring	32	30
Lowest gear	17.9 in	16.7 in
Highest gear	92.8 in	87.0 in
Cockpit
Shifting	Mechanical	Electronic
Derailleur hanger	Not informed	UDH