I am thinking of starting a business in the Wheels and Tires industry. I have read the SEMA Market Research papers but I would like more research data about Wheels and Tires industry. May I know how can I find more information about the Wheels and Tires industry? Some of the info that I am looking for would be:

1. How many online tire/wheels vendors in U.S.?
2. What percentages of tire/wheels sales are being done online?
3. How much are consumers spending on tire/wheels?
4. On the average, how many set of wheels are used in a car? i.e. how often people change their wheels on a car?
5. What are the major buying factors for wheels? Brand? Price? Look?
6. Anything in the law / proposed law that would make any custom wheel and tires banned?

Any help would be appreciated.

:)