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WATCH: What’s happening in a car when wedge, track bar is adjusted

NASCAR Sprint Cup Series New Hampshire 301

LOUDON, NH - JULY 17: A general view of pit road as drivers pit during the NASCAR Sprint Cup Series New Hampshire 301 at New Hampshire Motor Speedway on July 17, 2016 in Loudon, New Hampshire. (Photo by Jerry Markland/Getty Images)

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A lot of technical terms get thrown around during the TV broadcast of a NASCAR race. Two of those are “wedge” and “track bar.”

The wedge can be taken in and out of the car on pit road while the track bar can also be adjusted.

JD Motorsports, the Xfinity Series team that will field Ross Chastain in 2017, has done a favor for those who don’t know for sure what’s going on when these parts of a car are tinkered with during a visit to pit road.

The team has shared a video showing what’s happening underneath a car when a crew chief calls for changes to the wedge and track bar.

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