16.5" wheels were TRUCK-type wheels. Used on 3/4 and 1-ton trucks. NOT car wheels by any stretch of the imagination. WITH split-ring rims, whose rings could fly off and hurt people/things. Which is why they leter had to be inflated inside of metal pipe fixtures.
16" factory wheels were popular in the 1990s and earlier 2000s. 225/60x16 was the popular tire size on Chrysler LH cars and almost every other car that used 16" wheels, back then.
The real and original Magnum 500s from Motor Wheel Corp were 14" for Chrysler use and 15x7 on Boss Mustangs. Of course, the 15x7 Ford Magnums will fit Chrysler products, too. Which explains the repro Magnum 500s from Ford wheel vendors (as noted).
In MANY cases, the PRICE of 17" wheels is less than for similar-size 16" tires. IF one is buying wheels and tires, the savings by going to 17" rather than 16" is not trivial.
17" wheels might look out of place on some cars, but just remember many who like then are a part of what I term "The Hot Wheels Generation". Names after little cars with huge wheels on them.
P235/55ZR-17 BFG g-Force COMP-2A tires have a revs/mile number of 766 revs/mile. Which is dang near identical to a P225/70R-15 BFG Radial T/A tire revs/mile number. Think G70x15 or H78x14 size equivalents. Of course, no whitewalls in those particular 17" tires. 17x7 VN501s are available, too.
Hankook Kinergy ST (and some others) offer 15" whitewall sizes. Diamondback Classics will fuse whitewalls (several designs) onto normal radial sidewalls (new tires) "for a price".
Enjoy!
CBODY67