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Cortina U4 Women's Bike 28" 57cm 7S Hub Dynamo - Matt Jet B
- EAN 8719461053556
- Brand: Cortina
- Product Model: 832140
Who doesn't know him, the transport bike with the characteristic robust appearance, sturdy frame and of course the front carrier.
The U4 Transport is the transport bike and a real must-have for school, work and that appointment with friends in the city.
A bike to use every day.
Due to the many colors and designs, there is always a bike that perfectly suits your needs!
- Stylish and robust transport bike
- Equipped with a sturdy front carrier
- Extra grip with the Cortina Canberra tyres
Specifications:
Brand: Cortina
Model: U4
Frame height: 57 cm
Gears: 7
Frame type: Women
Gear system brand: Shimano
Braking system: Double handbrake
Gear system type: Hub gear
Wheel size: 28
Drive: Chain
Luggage carrier: Rear/Front
Bicycle bell: Yes
Frame material: Aluminium
Suitable for child seat: Rear
Grips: Cortina Dakar
Weight: 23.5 kg
Front brake system brand: Shimano
Model year: 2023
Brake type: Rollerbrakes
Kickstand: Double-legged kickstand
Stem: Fixed
Handlebar lock: Yes
Tire type: Cortina Canberra with anti-puncture coating
Front braking system type: RK
Lock: AXA Solid Plus ART**
USB charging option: No
Rear light: Union 4370
Headligh: Cortina Amsterdam 18 lux
Lighting power supply: Hub dynamo
Front carrier: Yes
Fork: Fixed
Saddle: Selle Royal Witch
Seatpost: Fixed
-Bike: No
Dress guard: None
Gear: Shimano Nexus 7-Speed
Carrying capacity: 120kg
Tire size: 28 x 1.75
Color: Matt Jet Black
Children are generally taught to ride a bike at an early age.
The right size bicycle allows for a comfortable and safe riding position for children and teens, and stimulates maximum performance of the muscles.
Aside from being less tiring and preventing overexertion of the knees, the right size bike encourages regular bike use and cycling in general.
This size is usually based on the wheel diameter.
Children's Bicycle Size Chart | ![]() |
|||
Age (Years) |
Clothing Size |
Length | Recommended Children's Bike Size |
|
2 - 4 | 98 - 104 | ± 95 cm | 12 inch | |
3 - 5 | 100 - 106 | ± 100 cm | 14 inch | |
4 - 6 | 104 - 110 | ± 105 cm | 16 inch | |
5 - 7 | 110 - 116 | ± 110 cm | 18 inch | |
6 - 8 | 116 - 122 | ± 115 cm | 20 inch | |
7 - 9 | 122 - 128 | ± 122 cm | 22 inch | |
8 - 12 | 128 - 140 | ± 130 cm | 24 inch | |
10 - 14 | 140 - 152 | ± 145 cm | 26 inch |
This sizing chart for children's bicycles is based on age and length.
Not everyone is the same length at a certain age, so it’s advisable to determine the bicycle size based on length.
The most important factor in determining the right bike size, is the inseam length.
Body Length | Inseam Length | Recommended Bike Size |
![]() |
|
120 - 140 cm | <52 cm | 16 inch | ||
52 - 74 cm | 20 inch | |||
> 74 cm | 24 inch | |||
140 - 160 cm | < 62 cm | 20 inch | ||
62 - 80 cm | 24 inch | |||
> 80 cm | 26 inch | |||
> 160 cm | < 74 cm | 24 inch | ||
> 74 cm | 26 inch |
Most children that are 120 to 140 cm tall can ride a 20 inch bike, while children between 140 and 160 cm tall can ride a 24 inch bike.
A 26 inch bike is generally suitable for teenagers who are over 160 cm tall.
The right frame height is also very important: it is the first step to finding the correct riding position.
A bicycle frame that is too small or too large can lead to limited height adjustment options, which in turn may lead to an inconvenient height difference between the saddle and handlebars.
Use the inseam length to determine which frame size is right for you.
You can do this by measuring the inside of your leg, from the top of the thigh down to the floor.
Adult Bicycle Size Chart | ![]() |
||
Inseam Length |
Recommended Frame Size | ||
≈ 66 cm | 43 cm | ||
≈ 74 cm | 48 cm | ||
≈ 77 cm | 50 cm | ||
≈ 78 cm | 51 cm | ||
≈ 80 cm | 52 cm | ||
≈ 83 cm | 54 cm | ||
≈ 85 cm | 55 cm | ||
≈ 86 cm | 56 cm | ||
≈ 89 cm | 58 cm | ||
≈ 91 cm | 61 cm | ||
≈ 93 cm | 65 cm |
Choose the frame size closest to your results.
When in doubt, it’s best to pick the smaller frame size.
If you have any questions about determining the right bicycle size, you can always give us a call or send us an e-mail.
Cortina hit the market in the 1970s with a reliable range of city bikes and stands for quality, no-nonsense and reliability.
In 2006 Cortina began marketing itself as a true experience brand and by closely following market trends and developments, it was able to come up with a range of trendy lifestyle bikes, combining design, comfort, quality and affordability.
Although the first years did prove difficult, Cortina achieved true success with its 2008 collection, when it introduced the Cortina mothers bicycle and its accessories.
The following year Cortina really hit the jackpot with the Cortina Transport U4.
Cortina’s success continued in 2010 and today it is one of the fastest growing bicycle brands in the country.
In 2012 Cortina started a fashion campaign, collaborating with designer Michael Barnaart van Bergen.
Just like the clothing you wear, your bicycle is an expression of who you are.
Barnaat van Bergen designed five outfits inspired by the 2013 bicycle collection and a contest was held to find five models to be the new face of Cortina.
The brand plans to continue their fashion campaign next year.
Today Cortina has three product lines with various models:
- Originals: authentic bicycles with a retro look
- Utility: modern transport bikes
- Metropole: sporty urban bicycles
Your Cortina, your style.
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