ByK E-620 MTB (Mountain) Kids Bike

For the fun and adventurous at heart. While you can cruise the streets with ease on the ByK E-620 MTB (Mountain) Boys Kids Bike, with the new 1 x 9 speed wide range gears and a touch of the race tuned suspension, you can drop straight into the exciting world of off-road riding.


Available on back-order

Please note:
We can not ship this bike. We do this so you can ride knowing that your bike has been assembled by one of our skilled mechanics.
If you would like to order this bike you may Click and Collect

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ByK E-620 MTB (Mountain) Boys Kids Bike


620MTB | AGE: 10 – 14 YEARS | HEIGHT: 142.5 – 170 CMS

Ability Level: Comfortable with major skills and can ride up and down gutters. Seeking adventure.


Our attention to detail in the geometry and with every single component ensures a ride to remember, everytime. The ByK E-620 MTB (Mountain) Boys Kids Bike is just 13kg.


Committed to the ultimate off road potential, the ByK E-620 MTB (Mountain) Boys Kids Bike is a machine that inspires fun and adventure. While the enemy of kids MTB’s is typically sluggish handling and heavy weight, the ByK E620MTB is seriously light and has the performance to rival a World Cup bike.

Like the entire ByK Range, this is not a scaled down adult bike. Every single component has been considered, tested, custom sized and tuned to suit our rider’s profile. Our unique ergonomic riding position and geometry offer a range of riding positions and adjustability unexpected at this size.


We have weighed every single component, measured to a millimeter the geometry and ergonomics and tested on every trail we could find. Our long list of premium components is outstanding.

We have broadened the range of our world class Microshift Rapidfire 9 Speed Trigger Shifter Gears. We’ve customised the tuning of our off-road suspension forks for kids specific use and made them on-road friendly with lock out control.

You’ll also see we’ve increased the power of our V brakes to match the performance of many disc brakes down hill but at the same time saved a huge amount of weight so the rider can get up and over hills too. We have strengthened our wheels, used extra grip lightweight tyres, an ergonomic saddle and customised our unique V bars for off-road fun.

Everything has been considered to make this bike perform in a class of its own. The ByK E620MTB re-defines MTB fun for kids.


From our responsive handling to increased safety at speed, the ByK E-620 MTB (Mountain) Boys Kids Bike range sets new standards in safety. The innovative frame improves balance and control to help each rider operate at the safest level possible.

To make a children’s bike safe, the rider needs to be able to brake efficiently and confidently. The custom-sized V-Brakes we have used are calibrated for age, ability and ergonomic fit. And they are made of non-flexing, strong and light alloy. Our light weight alloy rims ensure pedalling is easier. But more importantly alloy rims are a more efficient braking surface than cheaper, chrome-plated steel rims, and are therefore safer.

Little Details Count:

  • True cartridge bottom bracket for straighter chain alignment.
  • Microshift gears for maximum shift accuracy and reliability.
  • Super tough alloy wheels for reduced maintenance.
  • Calibrated V-Brakes for progressive braking.
  • Full grip pedals for added safety.
  • Machined surface rms for predictable braking.
  • Custom sized grips.

Additional information






Butted Alloy Frame, Low Gravity Concept Design, CRM Forks


Shimano Rapidfire 9 Speed Trigger Shifter Gears


Reinforced Alloy Wheels with Machined Braking Surface for Greater Power


Lightweight Micro Knobby Design with Tough Tubes


Alloy Tektro Front & Rear Calibrated V brakes

Brake Levers

Max Power Alloy Tektro Custom Sized Levers


Adjustable, Comfort Midi+ Deluxe


Custom Width Low Rise V-Bars

Safety Reflectors







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