ByK E-620 MTBG (Girl’s Mountain Bike)


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ByK E-620 MTBG (Girl’s Mountain 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.

The ByK E-620 MTBG (Girl’s Mountain Bike), for the fun and adventurous at heart. While you can cruise the streets with ease, with the ByK E-620 MTBG (Girl’s Mountain Bike) 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.

Our attention to detail in the geometry and with every single component ensures a ride to remember, everytime. Just 13kg.


Committed to the ultimate off road potential, the ByK E-620 MTBG (Girl’s Mountain 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 E-620 MTBG (Girl’s Mountain Bike) is seriously light and has the performance to rival a World Cup bike.

Like the entire ByK Range, the ByK E-620 MTBG (Girl’s Mountain Bike) 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 E-620 MTBG (Girl’s Mountain Bike) re-defines MTB fun for kids.


From our responsive handling to increased safety at speed, the ByK E-620 MTBG (Girl’s Mountain Bike) 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.

Features of E-620 MTBG (Girl’s Mountain Bike)

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


Additional information



Minimum seat height



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 and 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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