Polybush Dynamic is our intermediate hardness grade. It firms up the suspension without the same stiffness as our performance grade.
Polybush Dynamic bushes were recently trialed by a major vehicle manufacturer at the Millbrook Proving Ground. The Polybushes lasted 55,000 cycles. The best rubber equivalent gave up at 15,000 cycles.
Independent trials at a leading shock absorber manufacturer found that Polybushes reacted and sprung back to shape more quickly than rubber. They absorbed shock and protected the metal eye. They also ran 15° cooler - a measure of how much less stress Polybush molecules are under.