Radio Zuma 20 Complete Bike

The Zuma 20 Complete Bike.

Buying a bike for your child can be daunting, that’s why we developed the Zuma range to make it that much easier. Based on 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 bike 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 for that future.

FRAME: RADIO “ZUMA 20” frame, 6061-T6 alloy

FORK: RADIO “ZUMA 20” straight rigid fork, 6061-T6 alloy

BARS: 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

LEVER: PROMAX “BL-367” lever, alloy

BRAKES: PROMAX “DSK-310” - mechanical disc front & rear brake

CRANKS: 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, 7speed

FRONT HUB: RADIO disc hub, alloy shell, loose ball, QR crmo axle, 20h

REAR HUB: RADIO “ZUMA” disc cassette hub, alloy, sealed, QR, 20h

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

TIRES: VEE TIRE “CROWN GEM” tires, 2.25” front & rear

WEIGHT: 9.85kg / 21.72lbs