Leading steel wheels manufacturer Wheels India plans to enter into manufacturing of air-suspension for truck and trailers. The company is also working on ambulance system. On their future plans, the company proposed to increase the capacity of its five plants to 15 million wheels by next year from the present 13 million wheels at an investment of Rs 70 crore. Presently, the company is producing 12 million wheels (across five plants) and plans to add another million and half capacity over the next year. Of the Rs 70 crore, 'bulk' of the investments would go into their two plants in Chennai.