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Radio Bikes Zuma 24'' MicroSHIFT 8S Kids MTB Black 8 - 12 years

Radio Bikes


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Delivery from saturday


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What size kid's bike do i need?

This handy chart should show you the right bike for your child, based on age, height and wheel size (inches). Bikes with 12" wheels are generally balance bikes: with no pedals or cranks, they are designed to teach balance and control and are the perfect introduction for young children up to 90cm.

Kid's bike sizing guide:

Wheel Size 10'' - 12.5'' 14'' 16'' 18'' 20'' 24''
Rider Height (cm) 85 - 95 95 - 105 100 - 115 110 - 125 120 - 135 130 - 155
Age Range 1.5 - 3 3 - 4 4 - 6 6 - 7 7 - 9 9 and +

All little riders grow at different rates. So the best way of finding the right size bike for them is to look at models in their age range and then match their height to the right bike. As a rule, it’s best to get your child to sit on a potential new bike and to check that they can touch the ground with both feet.

Still confused? Contact us.

Note : Please note that specifications are subject to change without notice, based on component availability and other factors.

Christmas selection : extra 10% off on all kids bikes (except Commencal) with the code XMASKIDS10

* Code valid until 23/12/2022, to be entered before the validation of the basket, only on products sold by Alltricks, without minimum order. Please note that we cannot return an order validated without the discount code. Offer cannot be combined.

The Zuma range from Radio Bikes has been developed to meet the needs of the youngest riders. The geometry of the Zuma 24 is specific to children to make riding on all types of terrain easy and fun. It has an aluminum frame and fork, double-walled rims and other kid-specific components.

The + products:

  • Aluminum frame and fork.
  • Promax DSK-310 mechanical disc brakes.
  • 8 speed MicroSHIFT transmission.
  • Child size: 130 to 150 cm.


Frame Aluminum: RADIO ?ZUMA 24? frame, 6061-T6 alloy
Fork Aluminum: RADIO ?ZUMA 24? straight rigid fork, 6061-T6 alloy
Stem RADIO ?ZUMA 45? frontload stem, alloy, 45mm reach
Shifters MicroSHIFT, 1x8 speed
Rear derailleur MicroSHIFT, 8 speed
Crankset RADIO ?ZUMA? 3pc crank, forged alloy, 152mm length
Sprocket RADIO sprocket, steel, 32 teeth, narrow wide
Chain KMC chain, Z1 narrow type, 1/2? x 3/32?
Brakes PROMAX ?DSK-310? - mechanical disc front & rear brake
Wheels RADIO ?J25SE? rim, alloy, double wall
Tires VEE TIRE ?CROWN GEM? tires, 2.25? front & rear
Handlebar RADIO ?ZUMA 24? bar, 6061-T6 alloy, 31.8mm bar bore, 1? Rise
Saddle RADIO ?ZUMA 2024? railed seat
Seatpost PROMAX ?SP-2019? seat post, alloy, multi-adjust, 300mm
Child size 130 to 150 cm
Age 8 to 12 years old
Wheel size 24 inch




Gender Boy
Manufacturer Reference 01005340121
Wheel Size 24''
Groupset microSHIFT Mezzo 8S
collection 2021
Age 8 - 12




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