Build Information

This bike will be shipped un-built in it's standard bike box. Bikebug strongly recommend that this bike MUST be built by a trained mechanic, at a bike shop, or a mobile bike mechanic. Any assembly undertaken without professional assistance is at the customer's risk and any damage resulting from faulty assembly will not be covered by the warranty.

Note: The Small/Medium has a frame size of 13" and the Large/X-Large has a frame size of 14.5".

Innovative and lightweight with every detail precisely sized for this step up bike.

The Shimano 9 speed gearing is exceptional, with full cassette and twin hole cranks make distance riding easier than ever.

Their unique ergonomic riding position and geometry, along with premium components is unprecedented for a bike of this size. Just 12kg.

Features

Design - The E-620x9 is uniquely designed for children and is not a scaled down adult bike. Every single component has been considered, tested, custom sized and tuned to suit our rider's profile.

Their unique ergonomic riding position and geometry offer a range of riding positions and adjustability unexpected at this size. Along with our selection of premium components, this bike provides exceptional weight saving and rider comfort unexpected at this size.

Performance - The Shimano 9 speed gearing is exceptional with the full cassette combined with Shimano trigger shifters and twin hole cranks, distance riding couldn't be easier.

Strong wheels, durable tyres, tough tubes, comfortable ergonomic saddle, custom shaped handlebars, short reach and long reach pedal position, sealed bearings, grippy pedals and so so much more really separate ByK from the regular offering.

Safety - From their responsive handling to increased safety at speed, the ByK 620 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.
Shimano Cassette gears for maximum shift accuracy and reliability.
CRM forks for extra comfort and improved handling.
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.

Specifications

Weight 11.1kg
Minimum Seat Height 71cm
Frame Butted Alloy Frame, Low Gravity Concept Design, CRM Forks
Gears Shimano Rapidfire 9 Speed Trigger Shifter Gears
Wheels Dynamic Advantage Tall Alloy Wheels, Reinforced 36 Hole
Tyres Low-Profile, Low-Resistance Design with Tough Tubes
Brakes Alloy Tektro Front & Rear Calibrated V brakes
Brake Levers Alloy Tektro Custom Sized Levers
Saddle Adjustable, Comfort Midi+ Deluxe
Handlebars Custom Width Low Rise V-Bars
Safety Reflectors Included
Bells Included
Kickstand Included


Size Chart

Bike Model Wheel Size Compares To Age Group Rider Height Min Seat Height
E-200 200mm 12" Bike 2-4 years Small - MidSize 33cm
E-250 250mm 12" Bike 3-5 years 85-102cm 40cm
E-350 350mm 16" Bike 4-6 years 95-117cm 46cm
E-450 450mm 20" Bike 5-8 years 110-132cm 59cm
E-540 540mm 24" Bike 7-11 years 130-160cm 66cm
E-620 620mm 26" Bike 10-14 years 142.5-175cm 71cm


How To Determine Your Size

ByK Bikes are not categorised by the old imperial sizings of the past (like 12", 16", 20", or 24"). They use the metric system to describe their wheel sizes as 200mm, 250mm, 350mm, 450mm, 540mm and 620mm. Please use this chart to determine the bike size best suited to your young rider. 

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