I want to sell Racing T-shirt

[Sleepydriver]

I have a plan to sell racing T-shirt design to race teams. I also have friends who can produce the shirts, any advice in how to approach a race team?

[kubelwagen]

I hate to reveal to you about this ....but your chance is rather slim, because the racing T-shirts are usually designed by the race organizer itself. But in some races, there is still an opportunity for you to submit your T-shirt design. To do this you need to talk to the race organizer, it would be very helpful if you know someone in the team. To properly design a racing T-shirt, it is necessary to understand about the race theme in its history.

You should study the race's T-shirt design from the beginning until the past year, often you see only small difference from year to year, but it can help you to get a general idea of the T-shirt design, for example, if the race commences during a holiday, you may see some holiday's decor in the T-shirt.
Design your own T-shirt that doesn't deviate too much from the recurring pattern, the race organizer is likely to be reluctant to accept a radical design. However, it shouldn't stop you from adding some interesting elements, like logo that glows in the dark. You should also arrange the sponsors properly, for example, primary high-paying sponsors usually have larger logos, which are located on the back or at the front.