woom 4

(1 customer review)


The woom 4 has been revised for 2021. There have been tweaks to the frame design to improve the look and some component changes. The bike is suitable for a rider with an inside leg measurement of 52 to 67cm.
The Woom 4 is one of lightest 20″ wheel children’s bikes you can buy. The 2021 version of the bike only weighs 7.7kg. Its lightweight aluminium frame and forks, the child-friendly geometry and age appropriate components, all go to make this one of the easiest and most fun bikes of its size. The bike would suit a child aged around 6 to 8 years old. This bike features woom’s own adjustable stem which adds more flexibility in handlebar position for a better fit in the bike’s reach.
The Woom 4 has 8 speed SRAM twist grip gears, very light wheels and high quality Kenda tyres.  Available in 5 colours.

If you are having a bike shipped to you, watch our video on how to assemble the bike when you receive it. If you collect it from our store, it will be fully assembled.


SKU: c_489-1 Categories: , ,

Additional information



Derailleur (Rear)



Mini V-Type


6061 Aluminium


SRAM X4 Twist Grip


1" semi-integrated






28T Narrow-wide


520mm wide


Kenda Small Block 20 x 1.5"


Super-light Aluminium





Wheel Size

20 inches


Blue, Green, Purple, Red, Yellow

1 review for woom 4

  1. Nina Winkworth

    Having previously owned a woom 3 it was time to upgrade my son’s bike. He had just turned 6 and a confident rider I wondered if it was time to have a look at the other brands on the market. Having done a lot of research we discovered it came down to 2 brands …. Woom and Isla Bikes and that was reflected in the price. We decided to stick with brand loyalty and purchase the Woom 4 and I’m so pleased we did.
    Having worried the bike might be out of stock, I rang Simon who was extremely helpful and efficient and not only managed to source us a Woom 4 bike but also in the colour we wanted. In this Covid time after lockdown I would say he achieved the impossible.
    The bike arrived 4 days later, much earlier than expected and my son was over the moon.
    As always with the Woom bikes it amazes me how quickly my children manage to get to grips with riding. Within 20 minutes he had worked out the gears and was zooming around the place.
    Although the bike comes with a hefty price tag – I would say the bike is worth every penny! My son is a very confident happy little rider.
    Thank you Simon and the Little Bike Company.

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