this, is never really done in any off road class anymore.
Before the invention of 2 stage foams or moulded inserts then yes. but now we have no need, the inserts do all the work.
I have never heard of it being done in 8th!
and now you say you are using schumacher tires...well these are made of plastic and do not ballon anyway. so no need.
(infact, less invent a foam that allows the schumacher tyre too ballon a little
