The 26x11.00-R12 Carlisle ACT HD is the more aggressive big brother to the extremely popular Carlisle ACT. It features a larger tread depth of approximately 1" and carries a 6 ply rating. The tyre is also designed to run on 18PSi pressures giving it a greater load capacity. The Carlisle ACT HD offers great all round grip and quality construction that you would expect from Carlisle.