So my current quest is a Nel Lusso based ....... Beach Bum Klunker named Nuthin's Easy. I still need to disassemble and grease the rear hub but the gearing seems a bit tall. Hills are not really a factor. However, 1. I'm an old man and. 2. I typically use my klunkers for serious long rides. 3. It may at some point use Maxxis Hookworms. The easiest fix of course is a smaller ring up front. I have a couple 20" BMX bikes as donors. Will one of these bolt up to my current cranks? The end result will be something like 36/19. I do most of my riding on pavement. I have little interest in hauling ... but don't want to spin uncontrollably either. Looking for something I could jump on and ride 20-50 miles an not feel like I'm pulling a trailer. How small could I go in the front using the stock cranks?