The more I think about it and look at the photos of my tires, the more I realize they really are worn out. They are about 0.75 mm from the markers at the worst spot. Conclusion: I'm getting new tires. I'm still surprised I'd start hydroplaning at 75 km/hr but any way...now I know!
I do know...
I don't know how to post a photo so I'm posting a link to my drop box folder:
https://www.dropbox.com/sh/q1mqw16h5smf2vk/AAAgVTzOljifH-0-INcStkoEa?dl=0
Quick summary:
In the rain, it feels like I'm loosing traction on all four wheels at speeds above 75 km/hr (45 mph). It only happens on uneven paved surfaces that have a slippery finish however I am surprised that it's happening at all. My tires are slightly worn but I think it might be...