The problem is that the relatively small roller diameter causes a lot of flexure of the tire rubber and fabric plies. You can do a few things to keep tire wear to a minimum. Keep the tires inflated fairly hard. Use the minimum amount of pressure on the roller required to avoid slippage. Using lower gears and spinning faster will require less pressure on the roller and on your knees. If it is practical you might consider gluing a strip of fairly coarse sandpaper to the roller; this will increase the diameter slightly and increase the friction to lessen the amount of force needed to avoid having the tire slip. Choose the winding direction to avoid the tire trying to peel it off. I have seen special trainer tires advertised but have no experience with them.