The rims that you are referring to are PCCC "turbo" wheels. Very popular on the atc90s and early atc110s as well as the 1981 atc250r as they were the only 250r that came stock with 3x100 bolt pattern hubs. Depending on price and condition, I may have picked those up. I do have several nos PCCC "turbo" wheels in their original boxes though. They came in several different colors. Red, Black and I think yellow. They were quite the ticket to a fancy trike for awhile. They are cast aluminum rims and can be polished out very nice. Most people usually used them with a steel wheel half or an aftermarket aluminum wheel half.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90