I have a Taylor Academy nylon crossover (25.5" scale, I think). Taylor ships them with high tension strings. I switched to Thomastik "rope core" strings. All 6 have stranded steel cable cores, the trebles are flat-wound with nylon, and the basses are flat-wound with silver-plated copper. Oddly enough, the tension is slightly lower than the stock strings despite the steel cores. I use them because I keep my nails short and they make it easier to get a good tone with flesh, but as a bonus I really like way they feel to both hands. I've though about trying them on a steel-string acoustic, although the neck and bridge would certainly need adjustment.