Nukeproof Reactor 275 Alloy Pro

2021 MountainTrail Manufacturer page

Nukeproof Reactor 275 Alloy Pro, color Brushed Alloy

Price: Not published

Prices shown first for United States
United Kingdom: £3,699 Last known price
Travel: 150 / 140 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 12 32t / 10–52t
Gear range: 520%
Weight: 14.1 kg 31.1 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

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 275 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, internal cable routing, ISCG 05 mount, 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
- SRAM XG-1275 Eagle 12 speeds 10–52t
XG-1275
Chain
- SRAM GX Eagle 12 speeds
Crankset
- SRAM GX Eagle DUB 11 speeds 32t
Rear derailleur
- SRAM GX Eagle 12 speeds
Shifters
- SRAM GX Eagle Trigger 12 speeds

Brakes

1 part

Brakes
- SRAM Guide RE

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 454mm

Stack 605mm

Wheelbase 1181mm

Head angle 66.0°

Seat angle 75.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	425	454	482.5	516
Stackmm	600	605	609	613.5
Top tube lengthmm	580	610	640	675
Seat tube lengthmm	381	420	458	508
Head tube lengthmm	110	115	120	125
Head tube angle	66°	66°	66°	66°
Seat tube angle	75.5°	75.5°	75.5°	75.5°
Chainstay lengthmm	430	430	430	430
Wheelbasemm	1150	1181	1212	1247
Front centermm	728	759	790	825
Bottom bracket dropmm	18	18	18	18
Bottom bracket heightmm	336	336	336	336
Standover heightmm	723	721	722	725
Fork rakemm	46	46	46	46
Trailmm	110.73	110.73	110.73	110.73
Stack/reach ratio	1.41	1.33	1.26	1.19
Suspension and parts
Front travelmm	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: 14.1 kg

31.1 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: 16.9 in
Highest gear: 88.0 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: 2.5″
Wheel material: Aluminum
Wheel size: 27.5″

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: 2021
Sample: 1,325 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

16.9 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

88.0 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: 33.7 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: 16.9–88.0 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 275 Alloy Pro	Nukeproof Reactor 275 Alloy Comp	Nukeproof Reactor 275 Carbon Elite	Nukeproof Reactor 275 Carbon Factory	Nukeproof Reactor 275 Carbon RS	Nukeproof Reactor 290 Alloy Comp
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon	Carbon	Aluminum
Bicycle weight	14.1 kg	14.67 kg	14.5 kg	14.1 kg	13.9 kg	15 kg
Suspension
Front travel	150 mm	150 mm	160 mm	160 mm	160 mm	140 mm
Rear travel	140 mm	140 mm	140 mm	140 mm	140 mm	130 mm
Drivetrain
Smallest chainring	32	32	32	32	32	30
Largest chainring	32	32	32	32	32	30
Largest sprocket	52	51	51	51	52	51
Lowest gear	16.9 in	17.3 in	17.3 in	17.3 in	16.9 in	17.1 in
Highest gear	88.0 in	88.0 in	88.0 in	88.0 in	88.0 in	87.0 in
Other specifications
Wheel size	27.5″	27.5″	27.5″	27.5″	27.5″	29″