New Tires

Many of us like Kenda tires. The Cruiser & Challenger are the ones that I have on mine.

My '85 is still at my old house, but I'm pretty sure that the Challenger is on the back & the Cruiser is on the front.
I'm trying out a Prerelli rear tire on my '86. The front is still a 90/90/18 51H Kenda Cruiser.
One thing to add. Since I now live in Amish territory, many of the roads are gravel. These tires are the BEST that I've ever had for use on gravel & dirt roads! Other Rebel riders have said the same.
The Perelli rear tire seems to be very good too. But, I've only been using it for about 8 months.

The Cruiser wasn't available at the time that I needed one. But I do love the Challenger. If I had gotten a Cruiser for the back, my story might be different. I know this setup works.
By the way... We ride 2-up on these w/o any issues for hundreds of miles at a time.

If you have them done "professionally", be sure to check out your spokes before (show them that they are all tight & unbroken), and after the work is done.
Speaking from having a bad experience, trust after verification.
I now always do mine myself!