The Carlstar Group LLC plans to increase prices on its specialty tire products on or before March 1, 2017.

The increase affects all tires, and all brands -- Carlisle, Marastar, Marathon and Ultra CRT -- and will be between 8 and 12%.

Carlstar's previously announced increase for ITP-branded tires stands, and will be effective Feb. 6, 2017.

The company is citing escalating raw material costs as the primary reason for the increase, and says "significant volatility in the market may require further increases."