I have heard that temperary use of OTT do not require chain removal. Even long term use, if the tire size is the same and you keep track of tire pressures and flats you shouldnt have a problem. Keep in mind that if you remove the front chains, you will be putting ALL the load on the rear chains. Kinda defeats the purpose of removing chains to eliminate stress doesnt it.With steel grousers we never unhook chains. Put a few thousand hours on them. Not sure about rubber otts