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Cortina E-U4 E-Bike Men 28" 53cm 7S - Black
- EAN 8719461036283
- Brand: Cortina
- Product Model: 691469
In the Cortina collection you will find various e-bikes with the Cortina Sport Drive system.
These bicycles are equipped with a front-wheel motor that provides support immediately when starting off.
The models with the Cortina Sport Drive 36 volt system have the option to set how quickly the support should start.
This Cortina E-U4 is also equipped with the Sport Drive system.
Add to this the characteristic robust appearance of the transport bike, the sturdy frame and of course the front carrier and you understand why this is the ideal e-bike for daily use!
This Cortina E-U4 comes standard with a Cortina SportDrive 300Wh battery and a SportDrive charger (2A).
An upgrade of the SportDrive battery to 400Wh or 500Wh is also possible, see the CombiDeals.
Specifications:
Brand: Cortina
Color specific: Jet Black Matt
Frame height: 53
Color code: UZZ 69005 Matt
Number of gears: 7
Frame type: Men
Gear system brand: Shimano
Brake System: Double Handbrake
Gear System Type: Hub
Wheel size: 28
Drive: Chain
Battery option: Yes
Luggage carrier: Rear/Front
Call: Yes
Easyfit carrier: No
Electrical system: Sportdrive 36v
Frame heights: 53,61,65
Frame Material: Aluminum
Suitable for child seat: Rear
Grips: Cortina Dakar
Weight: 28.5
Color code touch-up pen: Jet Black UZZ 69005 Matt
Pedestrian function: Yes
Carrier brand: Cortina Ecomo
Brake system brand for: Shimano
Model year: 2021
Support positions: 8
Motor position: Front wheel
Brake type: Roller brakes
Sensor: Rotation
Default: Double Default
Stem: Fixed
Steering lock: Yes
Tire type: Cortina Canberra with puncture protection
Engine type: Cortina SportDrive front-wheel motor
Front brake system type: RK
Lock type: AXA Defender ART**
USB charging option: No
Rear lighting: Cortina powered by e-bike system
Lighting power supply: Battery
Lighting for: Cortina Amsterdam powered by e-bike system 18 lux
Lighting power supply: Battery
Reciter: Yes
Fork: Fixed
Saddle: Selle Royal Gipsy
Seatpost: Fixed
Model designation: None
Primary Base Color: Black
Display functions: speed, display support, battery filling, lighting control, walking aid, total distance, day off
E-Bike: Yes
Weight standard battery: 2.8 kg
Customer group: Men
Display type: SportDrive Grip
Dress guard type: None
Motor power: 250W
Packaging: Running carton
Gear: Shimano Nexus 7-speed
Battery location: Rear carrier
Motor force (Nm): 30 Nm
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 Fietsen
Ravensburgstraat 8
8028PZ Zwolle
The Netherlands
https://www.cortinabikes.com/
- Over 120.000 products
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- Over 3 million satisfied customers
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Our team of enthusiastic colleagues is ready to help you.
+31 (0)70 - 300 00 44helpdesk@hollandbikeshop.com

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