It's a 'forum'. People post a lot of pics, it's not magic.
You want to sell something, but don't want to look into 'how to'???
No one wants to see pics of online wheels/ tires, they want to see 'yours', for any curb rash/ tire wear etc.
As mentioned, get a 'Photobucket' account, upload pics there, highlight the 'IMG' code, copy/paste into your post here. So simple!
You should get a computer,