This is the first trike I have ever messed with, and these back rims are nasty. I would like to go to a smaller size actually, but how are these type of wheels replaced? Are these specific wheels that is only used for trikes, or can I use something else? I have about 12 junk bikes I can use for parts, but no other trikes.
![IMG_0255.jpg](https://proxy.imagearchive.com/cfa/cfacd23b0373a74b78fc708d7ba3ff4d.jpg)