Originally Posted by OldCoot
Don't think they put as much lateral stress on the axles as just going down the highway. All is does is stop the wheels from turning. Think of the stress put on the axles when you brake. Much more severe.
Your statement is not accurate. When you brake, you are applying pressure on the drums, pulling them equally (top & bottom) towards the axle. This will cause a twisting stress around the axle's center. The system is designed for this.The X type chalks are forcing the wheels apart from each other, putting (potentially a good deal) of stress on components that were not designed for that type of stress. Whether the stress is significant or not is a different question.