Bikes Trail/All-Mountain REACTOR ALLOY Reactor Alloy 290
The assembly of the product may differ from the photo. Be sure to check out the specifications.*

Reactor Alloy 290

Reactor 290 Alloy Pro Eagle90 REA01As(L)

  • S
  • M
  • L
  • XL
  • XXL
What is my size?
€4,499.00
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About Reactor Alloy 290

From concept to kinematics, geometry to spec, the Nukeproof Reactor was built from the ground up to be the ultimate aggressive trail bike. It climbs with precision but truly comes alive when you’re charging technical trails.

Constructed from a hydroformed and butted 6061 T6 aluminium alloy, with carbon fibre seat stays to reduce unsprung mass and optimise lateral stiffness. The Reactor delivers the perfect blend of low weight, strength, and stiffness.

Made for long days in the saddle, it’s your go-anywhere trail weapon—ready for epic adventures where a 1,000m climb leads to a 1,000m descent. Whatever the trail throws at you, the Reactor 290 Alloy is built to take it on.

Reactor Alloy 290

Specifications

  • Frame
    Nukeproof Reactor V2 290 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, ISCG 05 mounts, Max Bearings, Threaded 73mm BB, Boost 148mm rear ax
  • Fork
    RockShox Lyrik Select +, Charger 3.1 RC2, 29" Boost 15x110mm Maxle Stealth, Debonair, 150mm, Gloss Black, 44mm Offset
  • Rear Shock
    RockShox Super Deluxe Select+ Air, 210x55mm, Bearing End, Custom Tuned with 1 Token, Rebound 55, Compression 30, 4x Lockout
  • Wheelset
    DT Swiss M1900 Spline. F: 29", 15x110mm Boost, R:29", HG Freehub, 148x12mm Boost
  • Tyres
    F: Schwalbe Magic Mary Evo, Super Trail, TLE, 62-622 / 29x 2.4" Ultra Soft, R: Schwalbe Nobby Nic Evo, Super Trail, TLE, 62-622 / 29x 2.4" Soft
  • Crankset
    SRAM Eagle 90, 12-Speed, DUB, 165mm, 32T T-Type, 55mm CL
  • Shifter
    SRAM Eagle 90, 12-Speed MMX
  • Rear Derailleur
    Sram Eagle 90
  • Chain
    SRAM GX T-Type, 12-Speed Eagle, Flattop, PowerLock, 116 Links
  • Cassette
    Sram XS-1270 T-Type 10-52
  • Front Brake
    SRAM Maven Base, Organic pads
  • Rear Brake
    SRAM Maven Base, Organic pads
  • Rotors
    F: SRAM Centerline 2.0 180mm Rounded, R: SRAM Centerline 2.0 180mm Rounded
  • Handlebar
    Nukeproof Horizon V2 25mm Rise, Width - S/M780mm, L800mm, XL800mm, XXL800mm
  • Stem
    Nukeproof Neutron AM, 45mm, black
  • Saddle
    Nukeproof Horizon SL
  • Seatpost
    Tranz-X YS108 Internal with SRAM Remote lever, S:150mm drop; M:170mm drop; L:200mm drop; XL/XXL:230mm drop
  • Headset
    Nukeproof, 44-56 IITS
  • Grips
    Nukeproof Neutron Single Lock On, Diameter - S/M: 29.6mm, L/XL/XXL: 31.8mm
  • Pedals
    Not included **
  • Bike Weight
    15.17kg/33.4lbs (Tubeless)

Geometry

What is my size?
SMALL MEDIUM LARGE X-LARGE XX-LARGE
A Reach 435 460 480 500 520
B Stack 620.24 629.26 638.29 647.31 656.34
C Effective Top Tube Length 578.2 605.28 621.5 643.51 665.51
D Seattube Length 380 410 440 470 500
E Effective Seattube Angle Low 77° / High 77,5° Low 77° / High 77,5° Low 77° / High 78° Low 77° / High 78° Low 77° / High 78°
F Seattube Angle (Actual) Low 70.5° / High 71 Low 70.5° / High 71 Low 70.5° / High 71 Low 70.5° / High 71 Low 70.5° / High 71
G Saddle Height at Saddle Offset 650 700 750 800 850
H Saddle Offset at Saddle Height Low 146.4 High 146.6 Low 164.4 High 163.4 Low 174.2 High 172.9 Low 191.8 High 189.5 Low 209.4 High 206.2
I Headtube Length 100 110 120 130 140
J Headtube Angle Low 64.5° / High 65° Low 64.5° / High 65° Low 64.5° / High 65° Low 64.5° / High 65° Low 64.5° / High 65°
K Chainstay Length 440 440 445 445 445
L Front Centre 758.8 788.07 812.38 836.68 860.99
M Wheelbase 1198.8 1228.07 1257.38 1281.68 1305.99
N Bottom Bracket Drop (Front/Rear) Low -39 / High -33 Low -39 / High -33 Low -39 / High -33 Low -39 / High -33 Low -39 / High -33
O Bottom Bracket Height Low 330 / High 336 Low 330 / High 336 Low 330 / High 336 Low 330 / High 336 Low 330 / High 336
P Stand Over Height 745 750 755 760 765
Q Fork Travel 150 150 150 150 150
R Trail 132 132 132 132 132
S Fork Offset 42 42 42 42 42
T Axle to Crown 561 561 561 561 561
U Maximum Seatpost Insert 210 240 265 295 320

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