- FRAME: RADIO "ZUMA 20" frame, 6061-T6 alloy
- FORK: RADIO "ZUMA 1620 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: TEKTRO "MD280", mechanical disc front & rear brake, 140mm rotors
- 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, CS-H071, 12-28t, 7speed
- SHIFTER: MICROSHIFT, TS38-7R, 7speed
- DERAILLEUR: MICROSHIFT, RD-M21SS, 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, 20h
- REAR RIM: RADIO "J25SE" rim, alloy, double wall, 20h
- SEAT: RADIO "ZUMA 2024" railed seat
- SEAT POST: PROMAX "SP-2019" seat post, alloy, multi-adjust, 300mm x 27.2mm
- SEAT CLAMP: RADIO "SLIM" seat clamp, alloy
- TIRES: VEE TIRE "CROWN GEM" tires, 2.25" front & rear
Radio Bikes Zuma 20" Complete Bike
£576.99
Radio Bikes Zuma 20" Complete Bike
Buying a bike for your child can be daunting, that’s why we developed the Radio Bikes 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 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 Radio Bikes Zuma line is designed to give them the best possible start in for that future…
Weight: 10.03kg / 22.12lbs
Frame Geometry:
| Top Tube Length | 17.6" |
| Chain Stay Length | 14.8" |
| Head Tube Angle | 69° |
| Seat Tube Angle | 73° |
| Bottom Bracket Height | 10mm |
| Standover Height | 21.3" |
Handlebar Geometry:
| Rise | 1" |
| Width | 22.8" |
| Backsweep | 8° |
| Upsweep | 4° |
Need help choosing a BMX bike or finding the right BMX parts? You’re in the right place.
Visit our BMX Guide for helpful advice on bikes, parts, sizing and compatibility. If you’re still unsure, call or email Waller BMX, or click the chat icon to speak to our knowledgeable BMX team.
Please read the following regarding availability notices on our product pages;
- Waller BMX UK Store - High/Low stock available (Ready To Dispatch in 24 Hours)
This means the item is In-stock and ready to leave the Waller BMX store the same day if ordered within business hours.
- Warehouse Locations PO, WC, GER, TN, G4, RH1, SO, CB6, TN and DL - Low/High stock available
This item is in stock at our supplier’s warehouse. Dispatch times shown on the product page are estimated and may occasionally vary depending on supplier processing times.
Please contact us for pre order dates or alternative options that do not show available or listed.
- Spend over £75 and get Free Tracked UK Delivery
- Spend over £249.99 for Free Next Day UK Delivery*
*Excludes larger bikes and certain postcodes.
Visit our Shipping and Returns page for more information.
For more information on larger bike shipments click here.
For more information about lost or damaged parcels click here.
For more information about Customs and Duties see our FAQ.
We now have an Estimated Import Costs calculator on our product and cart pages to help you estimate duties. Please be aware unless stated we ship all International Orders using the option DDU (Delivered Duties Unpaid).
For extra information about ordering to outside the UK see here.
Save up to 42% on a new complete bike or parts! We accept major UK Cycle to Work vouchers, including Green Commute Initiative, Cyclescheme, and more.
How to order:
1. Select your bike or build.
2. Get a voucher/certificate from your employer or scheme provider.
3. Contact us or select Cycle to Work at checkout to complete your purchase.
Got questions about using your voucher? Drop us an email or message our live chat!
WALLER BMX - RIDER OWNED AND RUN BMX STORE IN SHEFFIELD / est 2012
Waller BMX is located in Sheffield, UK. We are lifelong riders with a passion for BMX. With knowledgable staff, we are like the riding encylopedia of BMX - Ask us anything!