I already run a t-shirt design company since 2013. We do designs on motorcycling, jeeps, cycling, running, gym, survival, humour and more. The name of my brand is iRide, and you can see my designs on the t-shirt section on www.iridegear.com. With a team of 5 designers from premier institutes, we are the best fit for this project.
We can discuss what type of designs you need in every category, like in motorcycle focussed designs do you want humour, motivation, graphics, characters, etc. Then we can move ahead to make the designs for you. Once project is accepted, we can decide on the number and type of t-shirt designs and then start the project
Please feel free to see my designs under iRide brand, and discuss further details.