This damper is mainly designed for Rally Racing or Rally Cross. As road condition of Rally Cross is the most aggressive one, shock absorber must be of finest quality and strength as it is the most important part of suspension setup in rally gravel competition. We developed inverted tube design to meet each different road condition as sandstone, snow or silt. Long stroke and long spring absorbs chassis vibration, aggressively attacking the suspension during high speed bouncy road conditions and bear extreme G-force when turning. All spring rates settings had been tested by Rally Racing Team.