The problems of Compactable Urban Bicycle

This design is about bike that you can separate the components of it. It is an urban cycle that can be toned down to save space when not in use, because Urbanites don’t have enough space in their houses, and those who do… They don’t need bikes, they use their cars.
This design consists of 2 systems: Wheel folding system & Bike Structure System.

Wheel folding system The Wheel is composed of six modules, each one has a double pivot in the joints, this allows the wheel to fold and become smaller, the spokes are contained in the inner structure of the wheel, when you unfold the system, the spokes rotate to the center of the mechanism where it attaches to the center of the wheel.

Bike Structure System The double triangle structure is composed of expandable modules, each one collapses to a smaller dimension and then this modules aligns with the rotation of the axis in the joint of the structure. A special X aligns all the modules to their position.

Advantages:

Ø     You can transport  it everywhere you like. It is so easy to take it with yourself everywhere you want to go.

Ø      It occupies little space to keep it especially when you live in a small house it does not need much spaces to keep it.

Ø     You save it from the thives.It can not be stolen by other people.

Usability problems:

First of all, it does not have a brake mechanism either, which could cause accident and bad injuries. Secondly, the bicycle does not have a gear so that the speed cannot be arranged by changing the gear. Third, it is so complex with all of its components and requires a strength to put them together safely and strongly. Additionally, it will take time to combine or separate them each time. Because it is a combination of small components, it is not flexible to carry every person so there is maximum weight limit which makes them unsuitable for everybody. Another technical lack of the bicyle is that handlebar are design to go in a straight way so this makes it is hard to rotate easily and control it compare to normal bikes. Also it is obvious that it is designed for good weather and the good road conditions. Since the surface of the wheels is so smooth that it would cause slippery to drive in a snowy or icy weather. Also it is more suitable for the smooth road condition like in a modern city, not suitable earth road in rural area.
Solution:

You know the brake is used to slow down when you ride in a high speed. We should use the brake in the bike because it causes a lot of problems if you do not have it.

The gears are so useful because when you want to go up hills and for adjusting your speed you should use them. So in this design we should  use the gears.

The separation and connection between the components are so time-consuming. If the users do not have enough time, it is a problem for them. So we should design it in a way that it does not take so much.

This design is not suitable for all the people with different weight, we should design in a way that everyone  with  different weight can be able to use it.

The surface of the wheels are so smooth that can be use only in a good road and weather, so we should change the surface of wheels so this bicycle can be usable for every road and weather.