Nukeproof Cub Scout 20 Sport: 

The new Cub-Scout 20” Sport is not just another kids bike: taking inspiration from our award-winning Scout adult hardtail range, the Cub-Scout 20” has been designed from the ground-up as a proper mini-mountain bike. It has been designed to allow kids to learn the ropes of riding, inspire confidence on the trails and act as the perfect platform for progression. Developed and tested with the help of our own children, we have created a class leading lightweight kids bike range to inspire and nurture budding future World Cup or EWS winners!

The new range of Cub-Scout bikes are available in 20”, 24” or 26” options; meaning that there should be a bike to suit kids of all sizes from aged 5 and up. Each bike features a lightweight custom butted 6061 Alloy frameset with bang up to date long, low and slack kids specific geometry.

Kids Specific Components:

Proper fit and function of components is essential for kids bikes because adult components are not optimised for smaller people. To ensure that these bikes fit and function perfectly, we took the time to test and develop our own or work with our partners to select the best kids-specific components we could find on the market.

Cub-Scout 20” Frame

Nukeproof 20”+ Rigid fork

Tektro Hydraulic Disc Brakes with short stroke levers for smaller hands

Nukeproof Neutron Jr Saddle

Nukeproof Neutron Jr Handlebar (20” – 600mm/24” – 640mm/26” – 700mm)

Nukeproof Neutron Jr Grips

127mm Samox Square Taper Crank

WTB STi 30 TCS Rims (Tubeless Ready)

Large Volume 2.6” Vee Rubber Tyres to ensure grip and a smooth ride

Click here for  2020 Nukeproof Bike Brochure


FrameNukeproof Cub-Scout 20”, custom butted hydro-formed 6061 Alloy, internal cable routing for dropper seat post, threaded bottom bracket, 142mm Bolt-thru rear axle spacing
ForkNukeproof Cub-Scout 20”+ Fork, custom butted hydro-formed 6061 Alloy, 1 1/8th Steerer, 40mm Offset, 15x100mm Bolt-thru Axle
Front Wheel Joytec D951-15 15x100mm hub on WTB STi30 20" TCS Rim
Rear Wheel Joytec D952TSE-X12 12x142mm hub on WTB STi30 20" TCS Rim
TyresFront & Rear: Vee Rubber Crown Gem 20" x 2.6” Skinwall
DrivetrainShimano M315 8-Speed, w optical display / Shimano M310 8-Speed
CassetteSunrace CSM55 8-Speed, 11-34T
CranksetSamox Square Taper 127mm, 32T
BrakesTektro M276 Kids Specific Hydraulic Brakes
RotorsTektro Wave, 160mm
HandlebarsNukeproof Neutron Jr 600mm Wide, 15mm Rise, 31.8mm Clamp
StemNukeproof, 40mm, black
Grips Nukeproof Jr Single Clamp lock on, 115mm Long, Soft Compound
SaddleNukeproof Neutron Jr, Black
SeatpostNukeproof Neutron Jr, Black, 27.2mm, 300mm Long, 0 Offset
Headset Nukeproof Warhead, 44-44 IESS
WeightWeight: 10.9kgs/24lbs


Hydroformed 6061 Triple-Butted Aluminium
Kids specific components
latest geometry frame
Custom tuned suspension


KEY Small Medium Large Extra Large
Recommended Height (Imperial) 3'9" - 4'4"4'1" - 4'6"4'5 - 5'1---
Recommended Height (Metric) 120-136cm127-142cm140-158cm---
Recomended inside leg (Imperial) 20-24"22-26"25-28" ---
Recomended Inside leg (Metric) 52-61cm57-66cm64-70cm---
Seat Tube265mm320mm360mm
Effective Top Tube459mm503.5mm550mm
Head Angle66.566.566
Head Tube100mm100mm100mm
Seat Tube Angle72.572.572.5
Chain Stay355mm405mm420mm
Bottom Bracket Drop-35mm-45mm-47mm
Fork Travel80mm100mm120mm
Axle to Crown 386mm455mm514mm---
Fork Offset38mm38mm46mm---
BB Type threaded 68mm BSAthreaded 68mm BSAthreaded 68mm BSA---