more info here
Most bicyclist will instantly think that a tire that runs on 33psi will have too much rolling resistance. This is bull shit, these tires have such thick side wall that they can stand up to more than 200lbs each at 7.5psi; the first time I rode to town and back, I had a slow leak, when I got home I measured the psi... boy was I surprised!
For Elf cars a 2.75”/19” tire on a 1.85” x 19” rim or wider! Wider tires need wider rims.
For my small cycle truck I need a 2.25”/16” for the front 20” tire. But for the rear 24” tire a 2.25/19 is needed. But only available in Europe and not worth the shipping to the U.S., and still may not fit on a bicycle rim.
A 24”MTB has a 20.5" O.D. rim but the 19” moped tire is measured at bottom of the bead just to confuse you. you need a moped rim, not a bicycle rim for 19" moped tire.
This is the only place in the usa that has these tires: https://www.treatland.tv
more info about moped tires:
These tires are bit heavy for people with weak legs, 4 to 6lbs each does not bother me. If you're riding a heavy cycle truck you need to build muscles! Or get a strong motor that will drive your lazy butt up an 8% grade with a total combined weight of 400lbs or more.
Moped tires and rims:
Pirelli Tire ML75 2.5-16 is officially 21.3 inches in overall diameter.
Bike rims do not provide the side wall height, only the value listed as 'rim depth'. So the larger moped tires may not be held well enough on the same size bicycle rim.
There does not appear to be 20-inch motorcycle tires that can mount onto a 24-inch bicycle rim in the same manner that a 16-inch motorcycle tire can be mounted on a 20-inch bicycle rim; the motorcycle sizes skip 20" altogether. Likewise, there does not appear to be a market for 22-inch bicycle rims which would seriously open up many more motorcycle tire options in the 18" range.
So if you want to use a motorcycle tire that will replace a 24 inch bicycle tire, you will have to use motorcycle rims, and possibly spokes.
Tire Conversion Chart: http://www.cb450stuff.com/tires/
motorcycle tire load rating index:
Rim sizes for bike tires:
16 inch (305mm)
Moped tire sizes: http://www.myronsmopeds.com/category/parts/tires/