Narrow rims on a 1450?
 

I understand I can’t pull narrow rims from a narrow frame and put them on a wide wide, are there any options for the wide frame cubes?

the narrow frame wheels will fit on wide frame also

They will go right on as long as your 1450 had the 3/4 spindles. If its a later machine with 1" spindles im not aware of any narrow wheels to fit

Bingo, I agree.

Mine have the 1”, thanks for clearing that up.

Think the bearings could be swapped out for larger ID to fit the 1” or?

machinist can cut the hubs out and install larger to fit 1" bearings.

I doubt if there is enough "meat" for that.
One would have to remove and install a larger hub center for that to work.
Just get a pair of 3/4" knuckles and use them.
Lots of those around, I'm sure!
Easy Peasy!!

You could also narrow your wheels. I have 1” spindles on my 129 and I narrowed my wheels to 4.25” by cutting a section out of the wheels and welding them back together. To me, the 16/6.5/8 Firestone 3-ribs looked too narrow on the 5.38” wide wheels. The wheel actually stuck out past the sidewall before.