by RichD » Mon Jul 18, 2016 8:01 am
Natural rubber is not stable, unless it is formulated correctly it can turn rock hard or turn to slush. Charles Goodyear got a patent for vulcanizing rubber in 1844, the folks that make tires for Carrera should probably take note. I have 50 year old rubber tires that are still in good shape. It has been reported that when cars with rubber tires that fell apart were left parked on plastic track that they made ruts in the plastic. If the car was stored in a jewel box the inside of the box got fogged up.