You might want to
read this Tech Tip dealing with wheels. Even though it primarily concerns wheels and tires for earlier trucks than yours, it does explain the difference between 2-piece and 3-piece wheels.
Most tire places that deal mostly with cars won't do a multi-piece wheel anymore and will tell you they are "dangerous" when the real reason is that they probably don't have anyone with any experience with them anymore. Most big truck tire centers and farm machinery service centers will still handle a multi piece wheel.
As said above, please take some detail pictures of your wheels. Do they look like either of these? The first picture is the 2-piece center split RH-5 that actually *is* a dangerous wheel. The 3-piece wheel, on the other hand, is generally safe as long as it is handled adequately and isn't rusted.
