2026 Nukeproof Reactor 290 Alloy Pro Bike

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Nukeproof

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Specifications

Product

Nukeproof Reactor 290 Alloy Pro Bike

Model Year

2026

Intended Use

Enduro / All-Mountain

Trail

Rider

Unisex

Sizes and Geometry

SM (High, Low)

MD (High, Low)

LG (High, Low)

XL (High, Low)

XXL (High, Low)

View Full Geometry

Size	SM (High, Low)	MD (High, Low)	LG (High, Low)	XL (High, Low)	XXL (High, Low)
Top Tube Length	578.20mm	605.28mm	621.50mm	643.51mm	665.51mm
Head Tube Angle	64.5°, 65°	64.5°, 65°	64.5°, 65°	64.5°, 65°	64.5°, 65°
Head Tube Length	100mm	110mm	120mm	130mm	140mm
Seat Tube Angle	77.0°, 77.5°	77.0°, 77.5°	77.0°, 78.0°	77.0°, 78.0°	77.0°, 78.0°
Seat Tube Length	380mm	410mm	440mm	470mm	500mm
Bottom Bracket Height	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)
Chainstay Length	440mm	440mm	445mm	445mm	445mm
Wheelbase	1198.80mm	1228.07mm	1257.38mm	1281.68mm	1305.99mm
Standover	745mm	750mm	755mm	760mm	765mm
Reach	435mm	460mm	480mm	500mm	520mm
Stack	620.24mm	629.26mm	638.29mm	647.31mm	656.34mm
Additional Info	• All specifications listed are with 150mm travel fork with 561mm axle-to-crown length and 44mm offset, for a trail value of 132mm • Geometry adjustable between via two-position flip chips ("Trail"/High and "Rail"/Low modes) in rocker linkage

Sizes Additional Info

• All specifications listed are with 150mm travel fork with 561mm axle-to-crown length and 44mm offset, for a trail value of 132mm
• Geometry adjustable between via two-position flip chips ("Trail"/High and "Rail"/Low modes) in rocker linkage

View Full Geometry

Size	SM (High, Low)	MD (High, Low)	LG (High, Low)	XL (High, Low)	XXL (High, Low)
Top Tube Length	578.20mm	605.28mm	621.50mm	643.51mm	665.51mm
Head Tube Angle	64.5°, 65°	64.5°, 65°	64.5°, 65°	64.5°, 65°	64.5°, 65°
Head Tube Length	100mm	110mm	120mm	130mm	140mm
Seat Tube Angle	77.0°, 77.5°	77.0°, 77.5°	77.0°, 78.0°	77.0°, 78.0°	77.0°, 78.0°
Seat Tube Length	380mm	410mm	440mm	470mm	500mm
Bottom Bracket Height	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)	330mm (39mm drop), 336mm (33mm drop)
Chainstay Length	440mm	440mm	445mm	445mm	445mm
Wheelbase	1198.80mm	1228.07mm	1257.38mm	1281.68mm	1305.99mm
Standover	745mm	750mm	755mm	760mm	765mm
Reach	435mm	460mm	480mm	500mm	520mm
Stack	620.24mm	629.26mm	638.29mm	647.31mm	656.34mm
Additional Info	• All specifications listed are with 150mm travel fork with 561mm axle-to-crown length and 44mm offset, for a trail value of 132mm • Geometry adjustable between via two-position flip chips ("Trail"/High and "Rail"/Low modes) in rocker linkage

Wheel Size

29"

Frame Material

Aluminum

Frame Material Details

Custom triple-butted hydro-formed 6061-T6 alloy front triangle and chainstays, UD-woven carbon fiber seatstays; 3D contoured frame protection for seatstays, chainstays, and lower down tube

Rear Travel

140mm

Rear Shock

RockShox Super Deluxe Select+, custom tune, 210mm length x 55mm stroke

Fork

RockShox Lyrik Select+, DebonAir spring, Charger 3. RC2 damper, 35mm stanchions, 44mm offset, Maxle Stealth thru-axle

Fork Travel

150mm

Head Tube Diameter

Tapered, 1.125" top, 1.5" bottom

Headset

Handlebar

Nukeproof Horizon V2, 25mm rise
Width: 780mm (SM/MD), 800mm (LG-XXL)

Stem

Nukeproof Neutron AM, 45mm length

Grips

Brakes

SRAM Maven Base, 4-piston, organic pads
Rotors: SRAM CenterLine

Brake Levers

SRAM Maven Base Stealth, tool-free reach adjust

Drivetrain

Shifters

SRAM Eagle 90 Transmission, 12-speed

Front Derailleur

None

Rear Derailleur

SRAM Eagle 90 Transmission, 12-speed

ISCG Tabs

ISCG05

Chainguide

None

Cranks

SRAM GX Eagle Transmission Alloy DUB, 165mm length

Chainrings

SRAM GX Eagle Transmission, 30 tooth, with bolt-on bashguard

Bottom Bracket

SRAM DUB, 73mm English/BSA threaded

Pedals

None

Chain

SRAM Eagle Transmission Flattop, 12-speed

Cassette

SRAM Eagle Transmission XS-1270, 12-speed, 10-52 tooth

Rims

DT Swiss M 1900 Spline Alloy

Hubs

DT Swiss wheelset, 15mm x 110mm (Boost) front, 12mm x 148mm (Boost) rear with HG driver

Spokes

DT Swiss wheelset

Tires

Front: Schwalbe Magic Mary, Evo line, Ultra Soft compound, Super Trail casing, TLE, 29" x 2.4"
Rear: Schwalbe Nobby Nic, Evo line, Soft compound, Super Trail casing, TLE, 29" x 2.4"

Saddle

Nukeproof Horizon SL

Seatpost

Tranz-X YS108 dropper, SRAM remote lever
Drop: 150mm (SM), 170mm (MD), 200mm (LG), 230mm (XL/XXL)

Seatpost Diameter

Seatpost Clamp

Single bolt

Rear Dropout / Hub Dimensions

12mm x 148mm (Boost)

Max. Tire Size

29" x 2.6"

Bottle Cage Mounts

One inside front triangle, plus accessory mount on down tube

Colors

Yellow

Warranty

Lifetime frame with registration, 2 years Nukeproof components

Weight

33 lb 7.1 oz (15,170 g)

Miscellaneous

• Four-bar Horst link rear suspension design
• Geometry adjustable between via two-position flip chips ("Trail"/High and "Rail"/Low modes) in rocker linkage
• Internal cable routing
• SRAM UDH (Universal Derailleur Hanger)
• Compatible with mixed ("Mullet") wheels (29" front, 27.5" rear) via 297 mixed-wheel Rail chip
• European price: 4499 EUR
• UK price: 3999 GBP

Price

N/A

More Info

Nukeproof is Back in Business - Updated Reactor First New Bike To Drop

Nukeproof website

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Where To Buy
	Free shipping on orders over $69 (continental U.S. only). International shipping available. Some exclusions apply.	Browse available Bikes
	Free shipping on orders over $50 (contiguous U.S. only). International shipping available. Some exclusions apply.	Browse available Bikes
	Free U.S. shipping on everything. International shipping available. Some exclusions apply.	Browse available Bikes
	Free shipping on orders over $50 (continental U.S. only). International shipping available. Some exclusions apply.	Browse available Bikes