bicycle

[Ju]

The direction of the wind ease the bicycle going very fast.

Shall I say :

The bicycle goes very fast in tail wind.
__________________________________________________ ______

The direction of the wind makes the bicycle going very slowly.

Shall I say :

The bicycle goes very slowly in head wind.
__________________________________________________ ______

Tom's bicycle cannot go steadily in straight line but keeps on moving left and right which causes accident to the bicycles.

Shall I say :

Tom's bicycle have been wiggling which causes accident to the bicycles behind.
__________________________________________________ _________

I ask Tom to control his bike on the same lane.

Shall I say :

I ask Tom to keep on lane.
__________________________________________________ ________


ju

[JMurray]

Ju.
1) The bicycle goes very fast with a tailwind.
2) The bicycle goes very slowly into a headwind.
3) Tom's bicycle has been wiggling/wobbling, causing accidents/collisions with the bicycle behind.
... for #3 I'm assuming you mean that the bike behind is running into Tom's bike.
4) I have asked Tom to keep/stay in his lane.

not a teacher

[5jj]

Ju, it is more natural to ask 'Can I say?' than 'Shall I say?