Nukeproof Reactor 290 Expert

2020 MountainTrail

Travel: 140 / 130 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 30t / 11–50t
Gear range: 455%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

MD 165–177
LG 175–188
XL 185–198

Components

16 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 290 Alloy, 130mm Travel, custom triple butted hydro-formed tube set for front triangle and chain stays, UD woven carbon fibre Seat stays, internal cable routing, custom tuned rear shock, internal dropper seatpost cable routing, Enduro bearings, threaded bottom bracket, boost 148mm rear axle spacing, 3D contoured frame protection Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

Threaded 73mm BSA Not identified
Cassette
- SRAM PG-1230 Eagle 12 speeds 11–50t
PG-1230
Chain guide

ISCG05 Not identified
Crankset
- SRAM NX Eagle DUB 11 speeds 30t
Rear derailleur
- SRAM NX Eagle 12 speeds
Shifters
- SRAM NX Eagle Trigger 12 speeds

Brakes

2 parts

Wheels and tires

3 parts

Rear hub

Boost 148x12mm Not identified
Rims
- WTB
Tires
- Maxxis

Cockpit and contact points

6 parts

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size LG

Table

Reach 480mm

Stack 620mm

Wheelbase 1235mm

Head angle 66.0°

Seat angle 75.5°

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 3 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	451	480	514
Stackmm	615	620	625
Top tube lengthmm	610	640	675
Seat tube lengthmm	420	460	510
Head tube lengthmm	105	110	115
Head tube angle	66°	66°	66°
Seat tube angle	75.5°	75.5°	75.5°
Chainstay lengthmm	440	440	440
Wheelbasemm	1205	1235	1271
Front centermm	767	797	833
Bottom bracket dropmm	33	33	33
Bottom bracket heightmm	341	341	341
Fork rakemm	51	51	51
Trailmm	111	112	112
Stack/reach ratio	1.36	1.29	1.22
Suspension and parts
Front travelmm	140	140	140

Not published by the manufacturer: Standover height, 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: 140 mm
Rear travel: 130 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

4 measures

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

Front travel

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,348 bicycles with this information
Coverage: 93.8% of the class

Lowest gear

17.4 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 84.6% of the class

Highest gear

79.1 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 84.6% of the class

Shifting

Mechanical

55 of 1,437 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,437 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
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: 2020
Lowest gear: 1217 bicycles with this information, 84.6% of the class
Highest gear: 1217 bicycles with this information, 84.6% 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 2020 builds

Differences across 2020 builds
Specification	This bicycle Nukeproof Reactor 290 Expert	Nukeproof Reactor 275c Elite	Nukeproof Reactor 275c Factory	Nukeproof Reactor 275 Comp	Nukeproof Reactor 275c Pro	Nukeproof Reactor 275c RS
Frame
Frame material	Aluminum	Carbon	Carbon	Aluminum	Carbon	Carbon
Suspension
Front travel	140 mm	150 mm	150 mm	150 mm	150 mm	160 mm
Rear travel	130 mm	140 mm	140 mm	140 mm	140 mm	140 mm
Drivetrain
Smallest chainring	30	32	32	32	32	32
Largest chainring	30	32	32	32	32	32
Smallest sprocket	11	10	10	11	10	10
Largest sprocket	50	51	51	50	50	50
Lowest gear	17.4 in	17.3 in	17.3 in	17.6 in	17.6 in	17.6 in
Highest gear	79.1 in	88.0 in	88.0 in	80.0 in	88.0 in	88.0 in
Other specifications
Wheel size	29″	27.5″	27.5″	27.5″	27.5″	27.5″