RADIO 20" Zuma Bike
Buying a bike for your child can be daunting; that’s why Radio developed the Zuma range to make it that much easier. Based around the concept of a kid-sized MTB bike, the Zuma bikes are incredibly lightweight, with carefully researched geometry and designed specifically around smaller riders as the perfect balance between a bike for a child to learn the basics on, and a more advanced MTB for off-road riding conditions for weekend rides with the parents.
With a full range of sizes from 14” for the first-time rider, all the way through to a 26” wheeled machine for the aspiring rookie, there is a Zuma for every rider. These carefully spec’d bikes feature a super lightweight alloy frame and fork with double wall rims and children-specific aftermarket components from Promax, KMC, FSA, Vee Rubber and Satori, making them suit the rider’s size perfectly, but look, feel and ride just like a high-end full adult size MTB.
Children are the future, and the Zuma line is designed to give them the best possible start in that future…
Specifications
Frame - Radio 'Zuma 20' frame, 6061-T6 alloy
Fork - Radio 'Zuma 20' straight rigid fork, 6061-T6 alloy
Handlebar - Radio 'Zuma 20' bar, 6061-T6 alloy, 31.8mm bar bore, 1″rise
Grips - Radio 'Zuma' grips, 110mm, flangeless
Stem - Radio 'Zuma' 45 frontload stem, alloy, 45mm reach
Headset - FSA a-headset, loose ball
Brake lever - Promax 'BL-367' lever, alloy
Brake - BLACK - Promax 'DSK-310' – mechanical disc front & rear. GREY - Tektro MD280 - mechanical disc front & rear.
Crank - Radio 'Zuma' 3pc crank, forged alloy, 145mm length
BB - Radio BB set, BSA, square taper, sealed bearing
Pedals - Radio 'Junior' pedals, nylon
Chain - KMC chain, Z1 narrow type, 1/2″ x 3/32″
Sprocket - Radio sprocket, steel, 32T, narrow wide
Driver - Microshift 12-28T, 7 - speed
Front hub - Radio disc hub, alloy shell, loose ball, QR Cr-Mo axle, 20h
Rear hub - Radio 'Zuma' disc cassette hub, alloy, sealed, QR, 20h
Rotor Size - 140mm
Front rim - Radio 'J25SE' rim, alloy, double wall
Rear rim - Radio 'J25SE' rim, alloy, double wall
Seat - Radio 'Zuma 2024' railed seat
Seat post - Promax 'SP-2019' seat post, alloy, multi-adjust, 300mm
Seat clamp - Radio 'Slim' seat clamp, alloy
Tyres - Vee Tyre 'Crown Gem' tyres, 2.25″ front & rear
Weight - 10.03kg
Frame geometry
Top tube length - 17.3″
Chain stay length - 14.75″
Head tube angle - 69°
Seat tube angle - 73°
BB Drop - 10mm
BB Height - 10"
Standover height - 9.5″
