Great score. Looks like an 81 atc250r. So the 3 bolt wheels would be the 3x100 pattern same as the late model atc90, the early model 110s and the early 185s. I always have had a soft spot for the wide tire trikes and I remember when those first hit the dealer floors, or should I say vanished from the dealer floors. They were the beginning of the modern atc and factory beginning of the dealer performance machines. A real classic. The 350x is also a very nice trike, but really the next generation of machine after the 81 and 82 250r let alone it being 4 stroke. You have done very well. Best of luck with your new finds.
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