The particular cushion I bought measures 60x60 cm and can lift 30 tons up to 40 centimeters!
I must have in truck a few wooden blocks. However, if truck is stuck in mud/sand the beam axle will be close to ground and I dont need wooden blocs in this case. Good part of using a lift cushion is that weight to be lifted is spread over a large ground area.
Wanted to do a quick test => 100% positive!