Cortina U4 Women's Bike 28" 57cm 7S - Mat Jet Black

EAN 8719461065047
Brand: Cortina
Product Model: 935123

In Stock : +/- 4-8 Business Days

Information
Size Chart
Supplier Info

Designed for carrying everyday loads around town, the Cortina U4 Transport combines a 57 cm low-step aluminum frame with a sturdy front carrier, double stand, and steering lock to keep the bicycle stable while parking or loading luggage. The Shimano Nexus 7-speed internal gear hub offers a practical range for commuting and shopping trips, while Shimano roller brakes at the front and rear are operated through two hand levers. Its 28 x 1.75 Cortina Canberra tires have an anti-puncture layer for additional protection during regular city use, and the rigid fork and fixed stem keep the setup straightforward. The Cortina Amsterdam 18-lux front light and Union 4370 rear light are powered by the hub dynamo, so no separate charging is required. A Selle Royal Witch saddle, Cortina Dakar grips, AXA Atlas ART** lock, and bell complete the equipment, while buyers should note that this version does not use a carrier click system and is not suitable for fitting a front child seat.

- 57 cm low-step aluminum frame for accessible everyday transport use
- Front carrier with double stand and steering lock for stable loading
- Shimano Nexus 7-speed internal gear hub
- Shimano roller brakes front and rear with dual hand controls
- 28 x 1.75 Cortina Canberra tires with an anti-puncture layer
- Hub-dynamo-powered Cortina Amsterdam 18-lux and Union 4370 lighting
- Equipped with an AXA Atlas ART** lock, bell, and Selle Royal Witch saddle
- Maximum permitted load of 120 kg

Specifications
Brand: Cortina
Model: U4 Transport
Type: Transport bike
Frame Type: Women
Frame Model: Low-step
Frame Size: 57 cm
Wheel Size: 28"
Tire Size: 28 x 1.75"
Drive System: Chain
Number Of Gears: 7
Gear System: Shimano Nexus
Gear Type: Internal gear hub
Gear System Brand: Shimano
Brake Type: Roller brakes
Brake Operation: Dual hand brakes
Brake System: Shimano
Front Fork: Rigid
Stem: Fixed
Handlebar Grips: Cortina Dakar
Saddle: Selle Royal
Seatpost: Fixed
Front Light: Cortina Amsterdam 18 lux
Rear Light: Union 4370
Lighting Power Source: Hub dynamo
USB Charging: No
Bell: Yes
Lock: AXA Atlas ART**
Stand: Double stand
Steering Lock: Yes
Front Carrier: Yes
Maximum Load: 120 kg
Frame Material: Aluminum
Color: 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.