Can You Guess Which Part Of the Bicycle is missing?

In this picture of the bicycle can you name the red portion A, B, C or D. Chose 1 from the given names.

Cool Weather Cycling Tips

Every Bike rider should take care of  himself / herself  and the bicycle to before starting a ride or commute, because "A Stitch In Time Saves Nine" approach can save us from a possible inconvenience.

Riding in the cold doesn't have to be miserable. With a little planning a ride in colder temperatures can be quite enjoyable. 

Get a Bike for your Kid to ride and Save our Planet

Bike is a Green environment vehicle, By adopting the use of  bicycles instead of Organic Fueled Vehicles we can reduce the emission of Carbon Mono Oxide and save the Climate Change