Surface texture of NASCAR tracks (smooth to rough)

By George Winkler | Wednesday, February 20, 2019

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NASCAR Creative Design

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From concrete tracks that are smooth as silk to ones that are as gravelly as Clint Eastwood's voice, NASCAR has a wide variety of racing surfaces. The sanctioning body regularly measures those surfaces and gives them a rating (in micrometers, for the variance between the highest peak to the lowest valley). The lower the variance, the smoother the track, and thus the lower the number. For more information on how the process works, read the story. For the full list (from smoothest to roughest), click through the slideshow. (Source: NASCAR R&D Center)

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Stacy Revere | Getty Images

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Martinsville Speedway, 118 micrometers (the smoothest track)

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Sean Gardner | Getty Images

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Dover International Speedway, 120

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Brian Lawdermilk | Getty Images

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Bristol Motor Speedway, 128

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Jeff Zelevansky | Getty Images

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Watkins Glen International, 168

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Chris Trotman | Getty Images

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Michigan International Speedway, 216

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ISM Raceway (Phoenix), 227

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Pocono Raceway, 232

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Kentucky Speedway, 245

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Chicagoland Speedway, 269

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Matt Sullivan/Getty Images

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Indianapolis Motor Speedway, 276

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Sarah Crabill/Getty Images

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Texas Motor Speedway, 285

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Jamie Squire/Getty Images

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Kansas Speedway, 334

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Jeff Zelevansky/Getty Images

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New Hampshire Motor Speedway, 342

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Sarah Crabill/Getty Images

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Talladega Superspeedway, 342

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Matt Sullivan/Getty Images

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Las Vegas Motor Speedway, 345

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Brian Lawdermilk/Getty Images

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Daytona International Speedway, 348

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Darlington Raceway, 374

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Sarah Crabill/Getty Images

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Charlotte Motor Speedway, 397

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Chris Trotman/Getty Images

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Sonoma Raceway, 436

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Sarah Crabill/Getty Images

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Richmond Raceway, 456

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Auto Club Speedway, 459

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Homestead-Miami Speedway, 499

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Atlanta Motor Speedway, 682 (the roughest track)

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