The Nukeproof Cub Scout 20 Sport: A proper kid's mountain bike
Let’s face it, your kid probably shreds harder than you. They deserve a bike that’s up to the task.
Taking inspiration from our award-winning Scout adult hardtail range, the Cub Scout 20 Sport has been designed from the ground up as a proper hard-hitting hardtail mountain bike.
Developed and tested with the help of our in-house test team (our own children), the Cub Scout is designed to inspire the next generation of riders as they gain confidence and learn the ropes of riding. It’s a class-leading miniature hardtail with 20-inch wheels.
How it Rides
The hydroformed 6061 lightweight aluminum frame is designed specifically with kid shredders in mind. The modern long, low and slack geometry is based on Nukeproof’s Scout hardcore hardtail, making it plenty capable on singletrack and burly enough to withstand regular off-road abuse.
We’ve also carefully selected components and specced youth-specific options where it made sense, such as shorter brake levers for improved control and resized crank arms. The front fork has also been specially tuned for smaller riders, and the cockpit — including the saddle, grips and handlebars — is from the youth-specific Nukeproof Urchin line.
The range of wheel sizes means you can choose the appropriate size bike for your kid, whether you’re looking for them to grow into the frame or for it to be a perfect fit from the gun.
It’s light enough for your kid to handle, durable enough for them to abuse, and with a spec kit chock-full of youth-specific components, you’ll know it’ll be a formidable match for your budding enduro racer.
The Nukeproof Cub Scout 20 Sport Component Details
- Cub Scout 20-inch alloy fork
- Microshift Acolyte 8-speed drivetrain
- Clarkes Clout kid-specific hydraulic disc brakes
- Joytec 20-inch wheels
- Maxxis Minion DHF 20x2.4 tires

Key Features
- Kid's Hardtail
- Hydroformed 6061 triple-butted aluminum
- Small person optimization & kids specific componentry
- 20-inch wheels
Specifications
![]() SPORTView$899.99
| ![]() RACEView$1299.99
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FRAME | Nukeproof Cub-Scout 20”, custom butted hydro-formed 6061 Alloy, threaded bottom bracket, 142mm Bolt-thru rear axle spacing | Nukeproof Cub-Scout 20”, custom butted hydro-formed 6061 Alloy, threaded bottom bracket, 142mm Bolt-thru rear axle spacing | FORK | Nukeproof Cub-Scout 20”+ Fork, custom butted hydro-formed 6061 Alloy, 1 1/8th Steerer, 40mm Offset, 15x100mm Bolt-thru Axle | Manitou Machete JUNIT 20” Expert Air, 80mm Travel, 1.5 Tapered Steerer, 40mm Offset, BOOST 15x110mm Bolt-thru Axle | SHOCK | NA | NA | FRONT WHEEL | Joytec D041-15 15x100mm hub on WTB STi30 20" TCS Rim | Nukeproof Neutron 15x110mm hub on WTB STi30 20" TCS Rim | REAR WHEEL | Joytec D952TSE-X12 12x142mm hub on WTB STi30 20" TCS Rim | Nukeproof Neutron 12x142mm hub on WTB STi30 20" TCS Rim | TIRES | Front & Rear: Maxxis Minion DHF 20" x 2.4” | Front & Rear: Maxxis Minion DHF 20" x 2.4” | CRANKSET | Samox TAF38J 2 Piece Crank 127mm, 32T, BCD 104 | Samox TAF38J 2 Piece Crank 127mm, 32T, BCD 104 | SHIFTER | Microshift Acolyte 8-Speed | BOX FOUR 8-Speed | REAR DERAILLEUR | Microshift Acolyte 8-Speed | BOX FOUR Short Cage 8-Speed with Clutch | CHAIN | KMC Z8.1 EPT 8-Speed | BOX FOUR 8-Speed | CASSETTE | Microshift CS-H083 12-42T | Sunrace CSM680 8-Speed, 11-42T | CHAIN GUIDE | N/A | N/A | BRAKES | Clarkes Kids Specific Hydraulic Brakes | Clarkes Kids Specific Hydraulic Brakes | FRONT ROTOR | Clarkes, 160mm | Clarkes, 160mm | REAR ROTOR | Clarkes, 160mm | Clarkes, 160mm | HANDLEBARS | Nukeproof Urchin 600mm Wide, 15mm Rise, 31.8mm Clamp | Nukeproof Urchin 600mm Wide, 15mm Rise, 31.8mm Clamp | STEM | 40mm, black | Nukeproof Neutron AM, 35mm, black | SADDLE | Nukeproof Urchin, Black | Nukeproof Urchin, Black | SEATPOST | Nukeproof Urchin, Black, 27.2mm, 300mm Long, 0 Offset | Nukeproof Urchin, Black, 27.2mm, 300mm Long, 0 Offset | HEADSET | Nukeproof Warhead, 44-44 IESS | Nukeproof Warhead, 44-44 IETS | GRIPS | Nukeproof Urchin Single Clamp lock on, 115mm Long, Soft Compound | Nukeproof Urchin Single Clamp lock on, 115mm Long, Soft Compound | BEARINGS | NA | NA | WEIGHT: | 10.02kg | 10.92kg |
California Proposition 65 Warning
This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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