ORIGINAL: ErikElvis
ORIGINAL: Dsegal
Some foam tires develop flat spots when the model is on the shelf.
My nexstar had a nice flat spot on the front wheel right out of the box. Looks horrible rolling on pavement but on grass no one can tell.
I build foam chocks that also support the airplane at the fuselage for some aircraft that won't fit in my cradle. This way much of the airplane's weight is on the support and not on the gear/tires.