Discover the Nukeproof Reactor: The Ultimate Aggressive Trail Bike
Are you ready to conquer the trails with confidence and precision? The Nukeproof Reactor is meticulously designed from the ground up to deliver unrivalled performance as the ultimate aggressive trail bike. Whether you're tackling technical climbs or pushing the limits on the most challenging trails, the Reactor is your trusted companion.
Crafted with precision, the Reactor frame is constructed from hydroformed triple-butted 6061 aluminium, ensuring lightweight strength and durability. To further optimize performance, the seat stays are expertly moulded from carbon fibre to reduce unsprung mass. With versatility in mind, the Reactor is available for both 27.5" and 29" wheel sizes, each with its own purpose-built frame to provide uncompromised performance.
Now, the choice is yours: Do you value manoeuvrability with the 27.5" wheel size, or crave the raw speed of the 29" wheel size?
One standout feature of the Reactor is the "flip chip," which allows you to adjust the geometry effortlessly between "Trail" and "Rail" modes:
- Trail Mode: Perfect for those who find joy in both climbing and descending, this setting optimizes the Reactor for trail riding, ensuring balanced performance on every aspect of your ride.
- Rail Mode: Ready to shred the corners with confidence? Activate Rail Mode to transform the Reactor into a corner-shredding machine. With a 6 mm bottom bracket drop and a slightly slacker head angle, it maximizes the bike's descending capabilities for an adrenaline-fueled experience.
To deliver an exceptional climbing and descending performance, the Reactor features a meticulously designed 4-bar horst linkage. It offers higher levels of anti-squat for efficient climbing in lower gears, while providing lower levels of anti-squat when you shift to higher gears. This allows the bike to excel on climbs while transforming into a trail hooligan when you hit top speeds. The progressive rate and balanced anti-rise figures ensure superior small bump compliance, mid-stroke support for cornering, and end-stroke progression for aggressive riding. The Reactor is designed to reward riders with a stoke factor that leaves you exhilarated after every ride.
Experience the thrill of the Nukeproof Reactor and elevate your trail riding to new heights. Get ready to conquer the trails with confidence and unleash your full potential on every adventure.
Nukeproof Reactor Geometry & Sizing

Nukeproof Reactor 290 Geometry 140/150 mm Fork |
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Sizes in MM | M | L | XL |
A: Stack | 615/618.4 | 620/623.5 | 625/628.7 |
B: Reach | 451/446.3 | 480/475.4 | 514/509.5 |
C: Head Tube Angle |
66° (Low 65.5)/65.5°(Low 65) | 66° (Low 65.5)/65.5°(Low 65) | 66° (Low 65.5)/65.5°(Low 65) |
D: Head Tube Length |
105 | 110 | 115 |
E: Effective Seat Tube Angle |
75.5° (Low 75)/75.1° (Low 74.6) | 75.5° (Low 75)/75.1° (Low 74.6) | 75.5° (Low 75)/75.1° (Low 74.6) |
F: Seat Tube Length |
420 | 458 | 508 |
G: Effective Top Tube |
610/611.2 | 640/641.2 | 675/676.3 |
H: BB Height | 336 (Low 330)/339 (Low 333) | 336 (Low 330)/339 (Low 333) | 336 (Low 330)/339 (Low 333) |
I: BB Drop | -33 (Low -39)/-30 (Low -36) | -33 (Low -39)/-30 (Low -36) | -33 (Low -39)/-30 (Low -36) |
J: Chainstay Length | 440 | 440 | 440 |
K: Wheelbase | 1205/1209 | 1235/1239.1 | 1271/1275.1 |
L: Standover - High | 736/739 | 744/474 | 769/772 |
M: Fork Offset | 44 | 44 | 44 |
Seatpost Diameter | 31.6 | 31.6 | 31.6 |
Handlebar Width | 780 | 800 | 800 |
Stem Length | 45 | 45 | 45 |
Max Seatpost Insertion | 215 | 250 | 300 |
Size | Rider Height |
---|---|
S | 160 cm – 171 cm |
M | 170 cm – 181 cm |
L | 180 cm – 191 cm |
XL | 190 cm – 201 cm |