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The liner damage can still matter because the force was concentrated during first contact
PowerPro Line Capacity: 50/600, 65/440, 80/360
Positional stability or roll-off is tested using a 4 kg (8.8 lb.) weight attached to first rear edge of the helmet by a cord with the helmet positioned and properly strapped on a headform facing downward at a 135 angle such that when the weight is released for a free-fall height of 0.6 m, it would tend to try to dislodge the helmet from its correct position on the head form
It is lightweight, reducing neck fatigue on extended rides
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