# Racing Harness Expiration Dates

**URL:** <https://forums.speedlife.net/t/racing-harness-expiration-dates/15941>\
**Category:** NYSpeed Automotive\
**Created:** [August 14, 2006, 5:48pm UTC](https://forums.speedlife.net/t/racing-harness-expiration-dates/15941 "2006-08-14T17:48:39Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![fairgentleman\_Z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fairgentleman_z/32/7263_2.png) [@fairgentleman\_Z](https://forums.speedlife.net/u/fairgentleman_Z)\
**Post date:** [August 15, 2006, 9:33am UTC](https://forums.speedlife.net/t/racing-harness-expiration-dates/15941/18 "2006-08-15T09:33:24Z")

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[http://www.motorage.com/motorage/data/articlestandard/motorage/162005/155698/article.pdf](http://www.motorage.com/motorage/data/articlestandard/motorage/162005/155698/article.pdf)

> Today’s belts are made from a  
> military grade (mil spec) nylon or polyester web.  
> Just as steel is stronger than iron because it can  
> bend, these materials are stronger because they  
> can stretch.

> In a crash, a driver’s body can exert thousands  
> of pounds of force on the belts. The trick to  
> reducing injury is to balance belt stretch with the  
> need to hold the driver in place. Even a small  
> amount of stretch helps to reduce what’s called  
> “the third collision.” The first collision involves  
> the vehicle, the second is the driver against the  
> restraining device and the third causes injury to  
> the driver’s internal organs.

[http://www.sfifoundation.com/seatbelt.html](http://www.sfifoundation.com/seatbelt.html)

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