Menu

Didn't find delivery to your country?

Our team is here for you

+43 144 20070
+43 144 20070

Mon - Fr: 10 am to 3 pm

info@koloshop24.com
info@koloshop24.com

We will reply within 24 hours

Contact Us Contact Us

679.00 €

Academy Grade 4 Belt children's bike 20" red

Did you find a better price?
If possible, we will give you an even better one. Don't hesitate to write to us.

Ask for a better price
Our Code: A8883

20" kids' bike, aluminum frame and fork, for children 115–130 cm (6–8 years), belt drive, adjustable stem, Shimano Nexus 7sp. gearing, weight 8.1 kg.

Detailed Description
Academy

The ACADEMY brand originates from Germany and specializes in lightweight and ergonomic children's bicycles, designed with a focus on the proper development of the child and the joy of riding. With…

More about the brand Academy
Need any help?
Radek - Technical Support
Radek Technical Support
Contact Me

20" kids' bike, aluminum frame and fork, for children 115–130 cm (6–8 years), belt drive, adjustable stem, Shimano Nexus 7sp. gearing, weight 8.1 kg.

Detailed Description
In stock
An expedition is possible tomorrow (delivery options)
Price Including VAT 679.00 €
Add to Favourites Add to comparison Watchdog

Do you have a VAT number? Shop without VAT.

Shipping from 90.00 €
Returns possible
within 30 days

Description

The Academy Grade 4 Belt is a lightweight 20" kids’ bike with high-quality components. Suitable for riders from 115 to 130 cm tall, for children aged 6 to 8.

The bike’s weight has a big impact on how much kids enjoy riding. A quality kids’ bike needs to be lightweight and easy to adjust. That’s why this bike weighs just 8.1 kg and is fitted with high-quality components. The lowered top tube makes it easier for children to get on and off.

Stem
The patented Syntace Vario stem grows with children both in height and length. It is infinitely adjustable and 100% stable in every position.

Q-factor
The Q-factor describes the overall width of the cranks and plays an important role in pedaling efficiency. Ideally, a bike’s Q-factor should match the rider’s natural stance width. A smaller Q-factor is more ergonomic, while a Q-factor that’s too wide forces the legs into an "X" shape when pedaling. This prevents smooth, ergonomically correct pedaling, which can lead to knee pain and rapid fatigue. Academy bikes have one of the smallest Q-factors on the market and are therefore ideally designed for children.

Saddle

The flat saddle provides maximum support and prevents slipping. The optimal saddle cover (neither too soft nor too hard) prevents sinking in and provides a comfortable, secure riding position that increases both comfort and the joy of riding!

Tires
Because Academy kids’ bikes focus on the strength-to-weight ratio for children, the bike is fitted with lightweight, narrow VEE TIRE Rail tires. Thanks to their tread pattern, they are ideal for both city riding and riding on gravel roads. They also look great and, with their reflective stripes, provide the visibility needed in traffic.

Designed by SCOOL

The developers of Academy bikes, in collaboration with the German Institute for Orthopedics, Osteopathy and Sports Medicine (DIOOS) under the direction of Dr. Andreas Elsner, have succeeded in developing ultra-lightweight kids’ bikes that meet the latest ergonomic requirements. All models are lighter than 40% of the average child’s weight, and frames with low, narrow bottom brackets allow children to pedal smoothly and effortlessly. Short cranks and an upright seating position make it possible to always reach the ground with their feet while also ensuring an ergonomic knee position while riding.

EAN: 4250969288834

Size chart

Wheel size Height (cm) Approximate age Models
12"
from 85 cm
from 1.5 years Grade 1
14" from 95 cm 2-4 years Grade 2
16" 105-120 cm 4-6 years Grade 3
20" 115-130 cm 6-8 years Grade 4, Trail 4, Pump 4
24" 130-145 cm 7-11 years Grade 5, Trail 5, Pump 5, Gravel 5
26" 140-165 cm 10-14 years Grade 6, Trail 6, Pump 6
27.5" from 165 cm from 14 years Gravel 7, Trail 7

Manufacturer: coolmobility GmbH, Ludwig-Erhard-Allee 3, 33719 Bielefeld, 0521 32 99 88 22, shop@coolmobility.de, www.academy-bikes.de

Specifications

Frame Set
Frame

AL triple butted

Fork

aluminum

Wheels
Tires

VEE TIRE Speedster 20"x1.50 (40-406), reflective stripes, 72 TPI

Rims

20" x 1.5" x 32H, aluminum, black

Hubs

front: Aluminum, 14G/32H, black, QR, rear: Shimano Nexus SG-C3001 7-speed freewheel, black

Drivetrain
Shifters

7s Shimano Nexus

Rear Derailleur

Shimano Nexus SL-7S31 twist grip shifter

Crankset

C-Drive 60T, 114mm, aluminum

Cassette

C-Drive 30T, 13mm, aluminum

Bottom Bracket

Thun Go(A)l 120L, 122mm

Components
Handlebars

560 mm, double butted aluminum, 20 mm rise

Grips

Velo black

Brakes

V-Brake, aluminum

Brake Levers

aluminum, 3-finger

Seatpost

Aluminum 27.2 mm x 250 mm

General Information
Weight

8.10 kg

Frame Material

Aluminum Alloy

Colour

Red

Activity

Cycling With the Kids

The manufacturer reserves the right to change the specifications of the bicycles without giving any reasons. In exceptional cases, the delivered product may differ from the listed specifications and images due to improved availability or functionality of the bicycle.

Academy

The ACADEMY brand originates from Germany and specializes in lightweight and ergonomic children's bicycles, designed with a focus on the proper development of the child and the joy of riding. With…

More about the brand Academy

Do you need help choosing the right product?
Contact us.

Ask a question
+43 144 20070 Mon - Fri: 10:00 am to 15:00 pm
Radek - Technical Support
Radek Technical Support

Product reviews

Similar Products

SR20-BR-3-IC
discount -10%
Early Rider Seeker 20" kids bike Brushed Aluminium 2026
In stock
Early Rider Seeker 20" kids bike Brushed Aluminium 2026

20" kids’ bike, for children aged 6–8, weight 8.8 kg, saddle height 51 cm, 20x2.35" tires, 8-speed chain drive, disc brakes

829.00 €
Buy
SR20-FG-3-IC
discount -8%
Early Rider Seeker 20" kids bike Forest Green 2026
In stock
Early Rider Seeker 20" kids bike Forest Green 2026

20" kids’ bike, for children aged 6–8, weight 8.8 kg, saddle height 51 cm, 20x2.35" tires, 8-speed chain drivetrain, disc brakes

829.00 € 909.00 €
Buy
SR20-EP-3-IC
discount -10%
Early Rider Seeker 20" kids bike Electric Purple 2026
In stock
Early Rider Seeker 20" kids bike Electric Purple 2026

20" kids' bike, for children aged 6-8, weight 8.8 kg, saddle height 51 cm, 20x2.35" tires, 8-speed chain drivetrain, disc brakes

829.00 €
Buy
SR20-BL-1-IC
discount -8%
Early Rider Seeker 20" kids bike Nordic Blue 2026
In stock
Early Rider Seeker 20" kids bike Nordic Blue 2026

20" children’s bike, for children aged 6–8, weight 8.8 kg, saddle height 51 cm, tires 20x2.35", 8-speed chain drive, disc brakes

829.00 € 909.00 €
Buy
SR20-VH-2-IC
discount -10%
Early Rider Seeker 20 Violet Haze children's bike 2025
In stock
Early Rider Seeker 20 Violet Haze children's bike 2025

20" children's bike, for children aged 6-8 years, weight 8.8 kg, seat height 51 cm, tires 20x2.35", 8-speed chain drive, disc brakes

829.00 €
Buy
005163
Woom 4 OFF children's bike 20" Black
In stock
Woom 4 OFF children's bike 20" Black

Children's bike, hydraulically shaped aluminum frame, carbon fork 20˝, equipped with Sram X5 1 x 9-speed, Promax disc brakes.

1 reviews
879.00 €
Buy
R011539
Rascal Wild 20 children's bike Ruby Red
In stock
Rascal Wild 20 children's bike Ruby Red

Children's mountain 20" bike, lightweight aluminum frame, aluminum fork, disc brakes, 9-speed gearing, child height 110-125 cm, weight 9.2 kg.

819.00 €
Buy
801.2026.20000
Superior TEAM 20 kids bike Gloss Brushed Alu / Red
In stock
Superior TEAM 20 kids bike Gloss Brushed Alu / Red

Children's XC bike, aluminum frame, rigid fork, equipped with Shimano Claris 1x8sp, weight 8.35 kg, for children 100-130 cm.

739.00 €
Buy
801.2026.20001
Superior TEAM 20 bike Gloss Brushed Alu / Rainbow Black 9.0"
In stock
Superior TEAM 20 bike Gloss Brushed Alu / Rainbow Black 9.0"

Children's XC bike, aluminum frame, rigid fork, equipped with Shimano Claris 1x8sp, weight 8.35 kg, for children 100-130 cm.

739.00 €
Buy
8835AC
Academy Grade 4 Belt children's bike 20" yellow
In stock
Academy Grade 4 Belt children's bike 20" yellow

20" kids' bike, aluminum frame and fork, for children 115-130 cm (6-8 years old), belt drive, adjustable stem, Shimano Nexus 7-speed, weight 8.1 kg.

679.00 €
Buy
A8881
Academy Grade 4 Belt children's bike 20" olive
In stock
Academy Grade 4 Belt children's bike 20" olive

20" children's bike, aluminum frame and fork, for children 115-130 cm (6-8 years old), belt drive, adjustable stem, Shimano Nexus 7-speed shifting, weight 8.1…

679.00 €
Buy
A8883
Academy Grade 4 Belt children's bike 20" red
In stock
Academy Grade 4 Belt children's bike 20" red

20" kids' bike, aluminum frame and fork, for children 115–130 cm (6–8 years), belt drive, adjustable stem, Shimano Nexus 7sp. gearing, weight 8.1 kg.

679.00 €
Buy
005887
Woom 4 OFF Air kids bike 20" Black
In stock
Woom 4 OFF Air kids bike 20" Black

Children's bike, hydraulically shaped aluminum frame, 20˝ air suspension fork, equipped with Sram X5 1 x 9sp., Promax disc brakes.

1 049.00 €
Buy
W008830
Woom 4 OFF AIR children's bike 20" Copper
In stock
Woom 4 OFF AIR children's bike 20" Copper

Children's bike, hydraulically shaped aluminum frame, 20˝ air suspension fork, Sram X5 1 x 9sp. setup, Promax disc brakes.

2 reviews
1 049.00 €
Buy
W010552
Woom 4 Explore children's bike 20" Red
In stock
Woom 4 Explore children's bike 20" Red

Children's bike with 20" wheels, for ages 6-8, suitable for a height of 115-130 cm, lightweight aluminum frame, hydraulic disc brakes, 1x7 Shimano gears,…

1 reviews
659.00 €
Buy
W010553
Woom 4 Explore children's bike 20" Neon Coral
In stock
Woom 4 Explore children's bike 20" Neon Coral

Children's bike with 20" wheels, for ages 6-8, suitable for height 115-130 cm, lightweight aluminum frame, hydraulic disc brakes, 1x7 Shimano gears, weight 7.8…

659.00 €
Buy
W010554
Woom 4 Explore children's bike 20" Jungle Green
In stock
Woom 4 Explore children's bike 20" Jungle Green

Children's bike with 20" wheels, for ages 6-8, for height 115-130 cm, lightweight aluminum frame, hydraulic disc brakes, 1x7 Shimano gears, weight 7.8 kg

659.00 €
Buy
BR20-SG-2-IC
discount -10%
Early Rider Belter 20 Auto Sage Green children's bike 2025
In stock
Early Rider Belter 20 Auto Sage Green children's bike 2025

20" children's bike, for kids aged 6-8, weight 7.7 kg, seat height 50 cm, tires 20x2.0", belt drive, 2-speed derailleur, rim brakes

599.00 €
Buy
R004760
Rascal 20 children's bicycle Titanium
In stock
Rascal 20 children's bicycle Titanium

Super lightweight children's bike with an original aluminum frame, belt drive, and a 3-speed Sturmey Archer planetary gearbox.

1 reviews
619.00 €
Buy
R004759
Rascal 20 children's bike Flame
In stock
Rascal 20 children's bike Flame

A super lightweight children's bike with an original aluminum frame, belt drive, and a 3-speed Sturmey Archer planetary gear hub.

3 reviews
619.00 €
Buy

Für Versand nach Deutschland, besuchen Sie bitte Academy Grade 4 Belt Kinderfahrrad 20" rot

Für Versand nach Österreich, besuchen Sie bitte Academy Grade 4 Belt Kinderfahrrad 20" rot

Chcesz dostarczyć towar do Polski? Sprawdź Academy Grade 4 Belt rower dziecięcy 20" czerwona

Chcete doručit zboží do České republiky? Prohlédněte si Academy Grade 4 Belt dětské kolo 20" červená

Chcete doručiť tovar na Slovensko? Pozrite si Academy Grade 4 Belt detský bicykel 20" červená

More than 20 years of cycling expertise
More than 20 years of cycling expertise

Proven quality you can trust

Leading brands
Leading brands

Handpicked and quality-checked

Expert advice
Expert advice

Our team helps you find your perfect fit

Our team is here for you
+43 144 20070
+43 144 20070

Mon - Fr: 10 am to 3 pm

info@koloshop24.com
info@koloshop24.com

We will reply within 24 hours