I emailed Continental about this, and was told that the Trail Attack 3 could be used as a substitution, but I'm not having much luck finding that either. They also told me that the RA4 will be coming out in 8 more sizes this year, but 130/80-17 isn't one of them
I'd really prefer to only replace the rear right now, if possible, but having grip in cold and wet conditions is important to me, and the main other tire I looked at before was the Metzeler RoadTec 01.....but apparently at least one of our sizes in that tire is a bias ply construction for some reason, so I don't think that would work.
How do the Michelin Road Classic and Bridgestone A41 compare to the RA3 for cold and wet conditions?
Edit: I see that the Road Classic is bias ply in most sizes, so I guess that's out as an option for only replacing the rear