Originally Posted by
ThermionicScott
Sure. If they're steel rims without bead hooks, I would be wary of trying to achieve the maximum pressure that a 1" tire would have on its sidewall, but apart from that you should be fine.
The only way to know for sure is to put 'em on, and press 'em up until the bead blows off with a load explosion. Then remount with a new tube and use a little less pressure.