The closest replacement is 215/60/15 check out the specs here. https://tiresize.com/calculator/
Just want to finish Bob's post here...."If you are lucky enough to end up on the ditch side AND lucky enough to survive."
In my case had the bike hooked up before I got it straightened out I was going across the center line into fast moving traffic going in the opposite direction. Most likely a non-survivable outcome.
After thinking it all over I have decided the best way (for me) to address the hydroplaning issue is to NEVER put myself in that situation again. It probly won't be the last time I get caught in the rain and the next time I will slow down, slow way down if there is a lot of standing water or pull over at an underpass or some form of shelter. If no shelter is available then pull over and just stand there and be miserable because no matter how miserable that might be it still beats a full body cast....or worse.
2017 Freewheeler
Billet Silver
Compassion for animals is intimately connected with goodness of character....and it
may be confidently asserted that he who is cruel to animals,cannot be a good man.