as far as i know all urals with a sidecar have reverse. they make one wheel drive and two wheel drive. two wheel drive is selectable. mine is one wheel drive. the two wheel drive model is heavier, more expensive, more complicated, harder to work on, and has a higher center of gravity because the sidecar has to sit higher to clear the driveshaft. all of that not by much. you can only use 2wd on loose stuff like gravel and snow. the 2wd is obviously better for snow and off road. i don't do either of those so i went for the 1wd. i did mine kinda like a bobber where i took off a lot of stuff to make it lighter, lower and faster. it didn't help with that but it made it look how i wanted.
Before:
After:
you're not really supposed to ride it without the car, because of the weird steering geometry designed to work with the car, but i've done it a few times and haven't even died once. it does handle weird though, especially once the tires are squared off from never leaning with the car attached. it gets a lot quicker though.