The normal air that you fill in your tyres consists of 78% nitrogen, 21% oxygen and 1% other gases and water. When you fill your tyre with nitrogen the pressure inside the tyre remains stable because the nitrogen molecule is larger than the others.

A puncture in your tyre makes handling and steering your vehicle difficult especially, if you are riding on tube tyres. Puncture can be caused due to external objects like nails, glass objects, debris, screw, bolts, sharp rocks etc.

The first sign of out of balance wheels is the vibration that can be felt in the steering, seat or floorboard when you are driving, especially at high speeds. Similar to misaligned wheel, unbalance wheels can be caused by uneven tyre wear, vehicle hitting a curb or a pothole etc.

Tyre rotation is changing the position of your tyres for more even wear so that they last longer. Front tyres are used for braking and steering. So, they get worn out quickly. Hence, after a period of one year or approximately every 10,000 km they need to be rotated.