[kosta55555]

photoshop 7 , painter 8 and illustrator for the wheel strings.

[kosta55555]

i would like to get critics or something ....

[Citizen Cow]

The spokes turned out very well.

Although it is an Alien Inspired bike and should probably be "organic" it is still a machine. When you render a machine I would think it would be important to keep certain aspects as angular and sleek as possible.
Besides the spokes there is not one part of the bike that conveys "metal" I think you might have used the smudge tool a little too much as it all looks very "mushy".
There are certain parts of the bike that have some pretty good detail but when it is looked at as a whole you notice it is missing a HUGE amount of detail.
Im just rambeling but I think you also have a few too many values going on. Its a b/w pic so try to pic, at most, three values, Black, Grey, LIGHT grey and use those three, avoid blending them into each other so much.
Darker Darks and Lighter Lights would help give it some depth as well.

Im sure if someone else would take the time they could explain in clearer terms.
Great Effort though!!

[Guy-Incognito]

If I were to pick out problematic areas of your design, kosta, the very first would be the definition of your shapes. The bike appears to sag under its own weight.

Secondly, I think the background is too busy. This really distracts the viewer.

Thirdly, the windscreen/visor looks like a sharks fin. This might be intentional but then it dosen't look like curved glass.

Other than these grumbles, I love some of the little ideas you've dropped in there, such as the webbed hand/wing acting as a mud guard