Nukeproof Reactor 275 Alloy Pro

2024 MountainTrail Manufacturer page

Price: Not published

Prices shown first for United States
United Kingdom: £3,799 Last known price
Travel: 160 / 140 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 12 32t / 10–52t
Gear range: 520%
Weight: 14.51 kg 32.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

Reactor 275 150mm Fork (Alloy)
Reactor 275 160mm Fork (Alloy)
Reactor 275 150mm Fork (Alloy)
Reactor 275 160mm Fork (Alloy)
Reactor 275 150mm Fork (Alloy)
Reactor 275 160mm Fork (Alloy)
Reactor 275 150mm Fork (Alloy)
Reactor 275 160mm Fork (Alloy)

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 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

7 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
Chain guide

None
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

8 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 275 160mm Fork (Alloy)

Table

Reach 450mm

Stack 609mm

Wheelbase 1185mm

Head angle 65.5°

Seat angle 75.1°

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 Reach Stack

Complete manufacturer geometry table 8 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	425	420.2	454	449.5	482.5	478	516	511.5
Stackmm	600	603	605	608.5	609	612.5	613.5	617.3
Top tube lengthmm	580	581	610	611.2	640	641.5	675	676.3
Seat tube lengthmm	381	381	420	420	458	458	508	508
Head tube lengthmm	110	110	115	115	120	120	125	125
Head tube angle	66°	65.5°	66°	65.5°	66°	65.5°	66°	65.5°
Seat tube angle	75.5°	75.1°	75.5°	75.1°	75.5°	75.1°	75.5°	75.1°
Chainstay lengthmm	430	430	430	430	430	430	430	430
Wheelbasemm	1150	1154	1181	1185	1212	1216	1247	1251
Front centermm	728	732	759	763	790	794	825	829
Bottom bracket dropmm	18	15	18	15	18	15	18	15
Bottom bracket heightmm	336	339	336	339	336	339	336	339
Standover heightmm	723	729	721	728	722	729	725	732
Fork rakemm	46	46	46	46	46	46	46	46
Trailmm	122	126	122	127	121	126	122	127
Stack/reach ratio	1.41	1.44	1.33	1.35	1.26	1.28	1.19	1.21
Suspension and parts
Front travelmm	150	160	150	160	150	160	150	160

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: 14.51 kg

32.0 lb

Suspension

Suspension configuration: Full suspension
Front travel: 160 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

160 mm

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 2,036 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

16.9 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 1,558 bicycles with this information
Coverage: 73.9% of the class

Highest gear

88.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 1,558 bicycles with this information
Coverage: 73.9% of the class

Shifting

Mechanical

346 of 2,107 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2024
Sample: 2,107 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.5 km/h
Highest gear: 33.7 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): 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: 2024
Lowest gear: 1558 bicycles with this information, 73.9% of the class
Highest gear: 1558 bicycles with this information, 73.9% 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 2024 builds
Specification	This bicycle Nukeproof Reactor 275 Alloy Pro	Nukeproof Reactor 275 Alloy Comp	Nukeproof Reactor 290 Alloy Comp	Nukeproof Reactor 290 Alloy Pro	Nukeproof Reactor 290 Carbon Elite	Nukeproof Reactor 290 Carbon Factory
Frame
Frame material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	14.51 kg	14.84 kg	15 kg	14.73 kg	Not informed	Not informed
Suspension
Front travel	160 mm	160 mm	150 mm	150 mm	140 mm	140 mm
Rear travel	140 mm	140 mm	130 mm	130 mm	130 mm	130 mm
Drivetrain
Smallest chainring	32	32	30	30	30	30
Largest chainring	32	32	30	30	30	30
Smallest sprocket	10	10	10	10	11	11
Largest sprocket	52	51	51	52	50	50
Lowest gear	16.9 in	17.3 in	17.1 in	16.7 in	17.4 in	17.4 in
Highest gear	88.0 in	88.0 in	87.0 in	87.0 in	79.1 in	79.1 in
Other specifications
Wheel size	27.5″	27.5″	29″	29″	29″	29″