I don't know about how they run on st1300s, but I have a set on my gsx1250fa, that I put on before my big 8000 mile trip all round the country last year. I now have close to 10K miles on them and they still have quite a bit of tread on them. I have another set sitting in the garage waiting to go on when these are done. All kinds of weather riding, hot, lots of twisties in AZ and NM, lots of straight fast freeway riding, lots of twisties in the Appalachians, quite a few runs in the Sierras, lots of rain riding.
I switched to these from the Michelin PR's and have also used the Roadsmart 2's. No comparison, these RS 3's are the best tires I've run on any bike. And they're reasonably priced as well. A friend of mine has them on his ST1100 and he's getting the same results.