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Cortina E-U4 Next Women E-Bike 28" 57cm 7S Bosch - Denim
- EAN 8719461061025
- Brand: Cortina
- Product Model: 883455
The Cortina E-U4 Next is the first Cortina bike equipped with the new Bosch smart system. The well-known Cortina U4 has been recognized for many years as a highly reliable bike with its stunning appearance. Now that this bike has hit the market with the Bosch system, we can truly say it’s a quality bike. The Bosch system on the Cortina E-U4 Next operates whisper-quiet and offers 4 levels of assistance. The bike comes standard with a 500 Wh battery. The ultra-quiet mid-motor ensures that you always arrive safely at your destination with the right level of pedal assistance. As mentioned earlier, this is a true quality bike. With its hydraulic disc brakes and 7 gears, you’ll be well-equipped for any journey.
- Motor Position: Mid
- Motor Brand: Bosch Active Line Smart
- Battery Capacity: 500 Wh
- Gears: Shimano Nexus 7
- Brakes: Hydraulic Disc Brake
- Fork: Non-Suspension
Specifications:
Brand: Cortina
Model: E-U4 Next
Type: E-Bike
Frame Size: 57cm
Gears: Shimano Nexus 7
Brakes: Hydraulic disc brakes
Wheel Size: 28 inches
Battery: Integrated 500 WH
Display: Bosch Purion 200
Lighting: Cortina Amsterdam powered by e-bike system 18 lux
Rims: Double-walled aluminum
Color: Denim
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/
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