they are pretty rough.. and IMHO.. not worth fixing.. however.. if it was me.. I'd take a sawsall and cut off the loose tread piece you have puleld up.. then run em till they fall off the rim.
I colelct antique tractors and use them.
I have tires that are that bad and worse, and run around every day. they will eventually go poof.. and when they do.. I'll replace them. no money gained replacing them now if you can run them ratty and get another year or three out of them.
My worst set looks liek that one.. but all over. I took the tractor to work one day when we were working on our liquid asphalt truck and draining the last 50g out to repair some spray bars, and put the 'tar' ( bituminius asphalt emulsion ) on sheet palsting and ran my tieres up and down it liberally till fully coated all the way around.. really tar's up to 3/4's up the side wall.
jacked up the rear , pulled the plastic, and let them set a week, then took it home. they were nice and shiney... that was in about 08 still got em.. still using them.
most of the tar has worn back off running around the pasture.. but the tubes inside the casings are still holding air.
when they go I will buy from tucker tire. they are the best deal on a tire shipped to my doorstep that I have found.
I can buy a tire, with tube, on a rim, and have it shipped to my door CHEAPER than getting the tire ALONE from my local farm store...
soundguy