No, you can look at them with the tires still on.

The thread Rich posted above has two picture links in the later part of the first post. One shows many types of multi-piece rims, and the other is of an actual Firestone RH 5* rim.
Those pictures should be all you need to see to then look at your wheels and tell if they are RH 5* or not.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-