Does anyone know how to replace the hub? Or can I just replace the one bolt?

Are parts for this available to everyday consumers?

Thanks!

 

Here is a picture of the components:

 

is it a lug stud? be more spacific?

 

I think its the stud...

 

if its a gd3 you dont have to press the bearing you can just bang it out if its on the front its pretty easy to do i just broke to on the same wheel the other day and i was dreading to do it but i found out that you dont have to press it just bend down the backing plate a little bit and bang it out then do the same on putting it back in but you got to grind the stud flat on one side to get it back in easy