Nukeproof Reactor 290c ST

2020 MountainTrail

Travel: 130 / 125 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 30t / 10–51t
Gear range: 510%
Weight: 12.7 kg 28.0 lb · Reference configuration not specified
Frame: Carbon
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 Carbon, 125mm Travel, UD woven Carbon Fibre front triangle/chain stays/seat stays, internal cable routing, custom tuned rear shock, 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
- Shimano Deore XT CS-M8100-12 12 speeds 10–51t
CS-M8100-12
Chain guide

ISCG05 Not identified
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

2 parts

Wheels and tires

3 parts

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 488mm

Stack 614mm

Wheelbase 1228mm

Head angle 66.8°

Seat angle 76.3°

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	460	488	521.6
Stackmm	608	614	618
Top tube lengthmm	608	638	673
Seat tube lengthmm	420	460	510
Head tube lengthmm	105	110	115
Head tube angle	66.8°	66.8°	66.8°
Seat tube angle	76.3°	76.3°	76.3°
Chainstay lengthmm	440	440	440
Wheelbasemm	1198	1228	1264
Front centermm	761	791	827
Bottom bracket dropmm	39	39	39
Bottom bracket heightmm	335	335	335
Fork rakemm	51	51	51
Trailmm	105	105	105
Stack/reach ratio	1.32	1.26	1.19
Suspension and parts
Front travelmm	130	130	130

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: Carbon
Bicycle weight: 12.7 kg

28.0 lb

Suspension

Suspension configuration: Full suspension
Front travel: 130 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 clearance: Maximum tire width: 2.6″
Tire width: 2.35″
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

130 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

17.1 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

Highest gear

87.0 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

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: 6.5 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): 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 290c ST	Nukeproof Reactor 275c Elite	Nukeproof Reactor 275c Factory	Nukeproof Reactor 275 Comp	Nukeproof Reactor 275c Pro	Nukeproof Reactor 275c RS
Frame
Frame material	Carbon	Carbon	Carbon	Aluminum	Carbon	Carbon
Bicycle weight	12.7 kg	Not informed	Not informed	Not informed	Not informed	Not informed
Suspension
Front travel	130 mm	150 mm	150 mm	150 mm	150 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
Smallest sprocket	10	10	10	11	10	10
Largest sprocket	51	51	51	50	50	50
Lowest gear	17.1 in	17.3 in	17.3 in	17.6 in	17.6 in	17.6 in
Highest gear	87.0 in	88.0 in	88.0 in	80.0 in	88.0 in	88.0 in
Other specifications
Tire width	2.35″	2.5″	2.5″	2.5″	2.5″	2.5″
Wheel size	29″	27.5″	27.5″	27.5″	27.5″	27.5″