Shinko 777 tires for my 2017 CB1100ex

[flynrider]

I haven't heard anything about the PR3 being discontinued. Back in 2016 Michelin said they had discontinued the PR3 and they became scarce. But they proved to be popular enough that Michelin brought them back in 2017. The only difference was that the 110/80 was no longer available for the front. Only the 120/70.

I still see both 18" sizes available for the CB1100 from the usual locations. No guarantees how long Michelin will decide to keep producing them.

The pre '17 cast rear wheels are also 4" in width. I don't think anyone has reported any issues with the 160/60-18 mounted on that rim.