Originally Posted by
Dannihilator
The liners will cause more flats than they will prevent. Between the liner and slime, I'd put the sealant in the tubes.
To OP I disagree with Dannihilator: I have had a liner in my front tire for years. I had 2-3 flats in a row many years ago. I bought the liner years ago. I have looked at my tire and pulled thorns and even a thumb tack out of my tire and have kept riding with NO flats.
I know it seems weird that I don't have it in the rear, but I put the one in the front and must have moved but never found a need for a second one.