Buying a bike for children can be daunting. That's why the ZUMA range was developed to make the decision easier. The ZUMA bikes are based on the concept of a kid-sized MTB bike. They are incredibly lightweight, have a carefully considered geometry and have been specifically designed for smaller riders. This creates the perfect balance between a bike for kids and an advanced MTB on which to learn the basics, on off-road rides or weekends with parents.
With a full range of sizes from 14" for beginner riders to 26" bikes for aspiring rookies there's a ZUMA for every rider. These carefully specified bikes feature a super-lightweight aluminum frame and fork, double-walled rims and kid-specific aftermarket components from PROMAX, KMC, FSA, Vee Rubber and Satori, so the bike fits the rider's size perfectly but looks, feels, and rides just like a high-end adult-sized MTB.
| Fork: | Radio “ZUMA 20” straight rigid fork, 6061-T6 alloy |
| Hubs: | Front: Radio disc hub, alloy, loose ball, QR CrMo axle, 20h / Rear: “ZUMA” disc cassette hub, alloy, sealed, QR, 20h |
| Rims: | Radio “J25SE” rim, alloy, double wall |
| Stem: | Radio “ZUMA 45” frontload stem, alloy, 45mm reach |
| Chain: | KMC Z1 |
| Color: | Black |
| Frame: | Radio “ZUMA 20” frame, 6061-T6 alloy |
| Grips: | Radio “ZUMA” grips, 110mm, flangeless |
| Tires: | VEE TIRE “CROWN GEM” tires, 2.25″ front & rear |
| Brakes: | PROMAX “DSK-310” mechanical disc brake front & rear |
| Pedals: | Radio “JUNIOR” pedals, nylon |
| Saddle: | Radio “ZUMA 2024” railed seat |
| Weight: | 9850g |
| Headset: | FSA Aheadset, loose ball |
| Shifter: | microSHIFT |
| Activity: | Cycling |
| Cassette: | microSHIFT 11-28t |
| Crankset: | Radio “ZUMA” 3pc crank, forged alloy, 145mm length, sprocket steel, 32t, narrow wide |
| Groupset: | microSHIFT |
| Material: | Aluminium |
| Item code: | RAD562264 |
| Seat post: | PROMAX “SP-2019” seat post, alloy, multi-adjust, 300mm, Radio “SLIM” seat clamp |
| Brake type: | Disc Brake |
| Frame type: | Hardtail |
| Handle bar: | Radio “ZUMA 20” bar, 6061-T6 alloy, 31.8mm bar, 1” rise |
| Model year: | 2022 |
| Wheel size: | 20" (406mm) |
| Dropper post: | no |
| Manufacturer: | Radio Bikes |
| Product name: | Radio ZUMA 20" - Mountainbike - 2022 - black |
| Cable routing: | external |
| Bottom bracket: | Radio BSA square taper, sealed bearing |
| Brake actuation: | Mechanical |
| Chainring ratio: | 32 |
| Rear derailleur: | microSHIFT 7 speed |
| Shifting system: | 7-speed |
| Usage bikesport: | MTB |
| Fork construction: | Rigid Fork |
| Manufacturer page: | https://radiobikes.com/ |
| Shifting actuation: | Mechanical |
| Number of chainrings: | 1 |
