Nukeproof Reactor 290 Carbon ST

2021 MountainTrail Manufacturer page

Nukeproof Reactor 290 Carbon ST, color Depressed Oubergine

Price: Not published

Prices shown first for United States
United Kingdom: £4,699 Last known price
Travel: 140 / 125 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 30t / 10–51t
Gear range: 510%
Weight: 13.2 kg 29.1 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

Reactor 290c ST
Reactor 290
Reactor 290c RS
Reactor 290c ST
Reactor 290
Reactor 290c RS
Reactor 290c ST
Reactor 290
Reactor 290c RS

The manufacturer did not publish rider heights for these sizes.

Components

16 of 18 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 Carbon, 125mm Travel, UD woven Carbon Fibre frame, internal cable routing, ISCG 05 mounts, Enduro bearings, Threaded 73mm BB, Boost 148mm rear axle spacing, 3D contoured rubber frame protection Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

BSA, 73mm, threaded Not identified
Cassette
- Shimano Deore XT CS-M8100-12 12 speeds 10–51t
CS-M8100-12
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Crankset
- Shimano Deore XT FC-M8100 12 speeds 30t
FC-M8100
Rear derailleur
- Shimano Deore XT RD-M8100-SGS 12 speeds
RD-M8100-SGS
Shifters
- Shimano Deore XT SL-M8100-R 12 speeds
SL-M8100

Brakes

1 part

Brakes
- Shimano Deore XT BR-M8100
BR-M8100

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

9 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size Reactor 290

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 Reach Stack

Complete manufacturer geometry table 9 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	460	451	446.3	488	480	475.4	521.6	514	509.5
Stackmm	608	615	618.4	614	620	623.5	618	625	628.7
Top tube lengthmm	608	610	611.4	638	640	641.2	673	675	676.3
Seat tube lengthmm	420	420	420	458	458	458	508	508	508
Head tube lengthmm	105	105	105	110	110	110	115	115	115
Head tube angle	66.8°	66°	65.5°	66.8°	66°	65.5°	66.8°	66°	65.5°
Seat tube angle	76.3°	75.5°	75.1°	76.3°	75.5°	75.1°	76.3°	75.5°	75.1°
Chainstay lengthmm	440	440	440	440	440	440	440	440	440
Wheelbasemm	1198	1205	1209	1228	1235	1239.1	1264	1271	1275.1
Front centermm	755.5	762.5	766.5	785	792	796	823	830	834
Bottom bracket dropmm	39	33	30	39	33	30	39	33	30
Bottom bracket heightmm	330	336	336	330	336	336	330	336	336
Standover heightmm	730	736	739	738	744	747	763	769	772
Fork rakemm	44	44	44	44	44	44	44	44	44
Trailmm	105	111	115	105	112	117	105	112	117
Stack/reach ratio	1.32	1.36	1.39	1.26	1.29	1.31	1.19	1.22	1.23
Suspension and parts
Front travelmm	130	140	150	130	140	150	130	140	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: Carbon
Bicycle weight: 13.2 kg

29.1 lb

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm
Rear travel: 125 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 17.1 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
Fork spring: Air
Tire width: 2.3″
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: 2021
Sample: 1,325 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

17.1 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Highest gear

87.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,347 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,347 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.5 km/h
Highest gear: 33.3 km/h

Total gear range 510%

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: 17.1–87.0 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1138 bicycles with this information, 84.2% of the class
Highest gear: 1138 bicycles with this information, 84.2% 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 2021 builds

Differences across 2021 builds
Specification	This bicycle Nukeproof Reactor 290 Carbon ST	Nukeproof Reactor 275 Alloy Comp	Nukeproof Reactor 275 Alloy Pro	Nukeproof Reactor 275 Carbon Elite	Nukeproof Reactor 275 Carbon Factory	Nukeproof Reactor 275 Carbon RS
Frame
Frame material	Carbon	Aluminum	Aluminum	Carbon	Carbon	Carbon
Bicycle weight	13.2 kg	14.67 kg	14.1 kg	14.5 kg	14.1 kg	13.9 kg
Suspension
Front travel	140 mm	150 mm	150 mm	160 mm	160 mm	160 mm
Rear travel	125 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
Largest sprocket	51	51	52	51	51	52
Lowest gear	17.1 in	17.3 in	16.9 in	17.3 in	17.3 in	16.9 in
Highest gear	87.0 in	88.0 in	88.0 in	88.0 in	88.0 in	88.0 in
Other specifications
Tire width	2.3″	2.5″	2.5″	2.5″	2.5″	2.5″
Wheel size	29″	27.5″	27.5″	27.5″	27.5″	27.5″