How do you adjust rear shocks on a 2007 Harley Davidson Street Bob?

The Road King shocks are air adjustable via an air valve located on the right side of the bike just above the rear tire.

Your Harley Davidson owner's manual will tell you what the shocks should be pressurized to depending upon the load on your bike (for instance - if you'll be carrying a passenger - the pressure should be a bit higher than it would be if you were riding solo).

Don't even attempt to read the pressure unless you have the specialized "hand pump" that is used to pressurize the shocks. You can purchase this from Harley Davidson or via a third party online.

The valve is a typical bicycle / auto air valve - but ... DO NOT attempt to pressurize it with anything but the specialized hand pump. Using anything else will risk over pressurization of your shocks and that's not good. The shocks hold a very small volume of air at relatively low pressure levels - so the hand pump is a must have.