Which shocks to replace?

I think that rod is threaded, so a few turns or so.

 

It's already bottoming out by the rub mark from rubber stopper id say it needs shocks too

 

I find many drivers do not install the proper tire for their application. Many guys install tires with tread lugs that are too aggressive and will cause a weird feeling. The lug basically flexes or wiggles and can cause drifting. So it depends on what you installed. As for recaps, in my opinion, recaps are only good for dump trucks or garbage trucks. They are not meant for the highway. I see over and over recaps that simply are not round and cause a little hop as they rotate to induce chassis shakes.

 

I started getting a shake and I'm gonna have my tires looked at. I'm seriously considering trying Centramatics on the whole tractor

 

Many people believe in them. I personally do not. First and foremost, the tire must spin round and true. If it has a wobble or egg shaped, it will always cause a shake or shimmy. Even brand new tires if installed improperly or not quite centered/square will cause this. Out of balanced tires are defective tires, period. Centramatics are only good for a few ounces. You really can't feel that. Any more than about 6 ounces and the tire is defective or low quality and should be replaced.

 

Airbag part number shows, 2510652C1