Cortina E-U4 Next E-Bike Men 57cm 28" 7S - Mat Black

EAN 8719461064392
Brand: Cortina
Product Model: 931511

In Stock : +/- 4-8 Business Days

Information
Size Chart
Supplier Info

This E-U4 Next from Cortina is a practical electric men’s transport bike for commuting, shopping and everyday city riding. This 57 cm high-frame version is equipped with the Bosch Active Line Smart System mid-motor, delivering 40 Nm of torque for smooth and natural assistance. The Shimano Nexus 7-speed hub provides simple, low-maintenance shifting, while Shimano hydraulic disc brakes offer dependable control in changing conditions. A MIK front carrier and MIK-HD rear carrier provide flexible options for compatible baskets, bags and other accessories. The Bosch Purion 200 display keeps important ride information and assistance settings easy to access, while the integrated battery position helps maintain a clean and balanced frame design.

- Practical electric transport bike for commuting and everyday city use
- Bosch Active Line Smart mid-motor with 40 Nm of torque
- Shimano Nexus 7-speed hub for simple and low-maintenance shifting
- MIK front carrier and MIK-HD rear carrier for flexible accessory mounting
- Hydraulic disc brakes provide dependable braking in wet and dry conditions
- Bosch Purion 200 display provides clear access to ride and support information
- CST Palmbay tyres with puncture protection suit regular urban riding
- Double kickstand and steering lock make loading the bike more stable
- Suitable for compatible front child-seat configurations

Specifications
Brand: Cortina
Model: E-U4 Next
Type: Electric transport bike
Frame Type: Men
Frame Model: High
Frame Size: 57 cm
Wheel Size: 28"
Tyre Size: 28 x 2.00"
Tyres: CST Palmbay
Electrical System: Bosch 36V BDU33 Smart
Motor: Bosch Active Line Smart System
Motor Position: Mid-drive
Motor Torque: 40 Nm
Power: 586W
Sensor: Rotation and torque
Assistance Levels: 4 + walk assist
Walk Assist: Yes
Display: Bosch Purion 200
Battery Position: Integrated
Battery Selectable: Yes
Drivetrain: Chain
Gear System: Shimano Nexus
Gear Type: Internal hub
Number Of Gears: 7
Brake Type: Hydraulic disc brakes
Front Brake Brand: Shimano
Rear Brake Brand: Shimano
Brake Operation: Dual hand brake
Front Fork: Rigid
Handlebar Stem: Fixed
Grips: Cortina Dakar
Saddle: Selle Royal Gipsy
Kickstand: Double kickstand
Steering lock: Yes
Lock: Abus Amparo 4650 R ART2
Bell: Yes
Front Light: Cortina Amsterdam
Rear Light: Spanninga Pling
Standlight: Front, rear
Lighting Power Source: Battery
Front Carrier: Yes
Rear Carrier: Yes
Front Carrier System: MIK
Rear Carrier System: MIK-HD
Max. Load: 120 kg
Weight Without Battery: 26 kg
Weight With Battery: 29 kg
Frame Material: Aluminium
Color: Mat 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.