Hello Bucky. You asked a question about Bonanza tire sizes
on a thread that was five and a half years old. Amazingly the OldMiniBikes member was still around to answer you. That usually doesn't happen, which makes your post somewhat ironic.
In this thread, you are asking about Bonanza designations, and already have two knowledgeable members trying to help you.
I agree with you on the "stupid" threads. I guess a lot of people are keen on playing rather dull word games as part of their social networking fix. Many topics discussed are now "Off Topic" and this is the general direction this forum has been headed for awhile now. It is indeed unfortunate.
Your best bet is to do a "Google" search, using site-specifics in your Boolean search, ie "old mini bikes" and add it to the rest of the search elements. There is a lot of information hidden within the walls. If nothing else, you can find archival information like that, and send PM's to inactive members who many decided to come out of the woodwork and help you.