Hi Chris,
You are absolutely right in your statement that on soft boggy ground with no bottom within reasonable reach the ruts etc will get deeper, but this is true with any vehicles driving over it, in the past we tended to stop if we were very stuck and go elsewhere but now the new breed of competition says proceed at all cost to ground! Is this the tyres fault? If on green lanes, we should keep off. If on the other hand organisers wish to make an event across similar ground then a vehicle with smaller wheels grounding out and being stubornly draged across it will definately cause more damage than just tyre rutts. I think it is for all of the organisers to think on this matter when inventing sections, We as organisers of ourselfs must think also.
The deep ruts as seen on the Ladoga will as Dolly says collaps in on themselfes very quickly, the softer the ground the faster this happens, Its like building a tall jelly "it can't be done above a sertain hight as the walls can not support it" Still makes a mess though
Lara.