Lead Changes

Does the Lead-Change Metric Determine a Good Race?

People often cite the number of lead changes in a race — the lead change metric — and suggest that a big number means a good race. The metric is simple, easy to get and elegant in a fundamental way.

It’s also misleading. […]

Darlington Raceway

Pit Road and Persistence Determine Darlington Outcome

Pit road performance always plays a huge role at Darlington Raceway. Equally important is how well a team can recover from a pit-road glitch. The latter played a huge role in Christopher Bell’s win tonight. […]

2026 NASCAR Rules

Will NASCAR’s New Stage-Break Rule Produce Lots More Green-Flag Laps?

NASCAR has a new stage-break rule after fan frustration over large numbers of caution laps. One reason for that frustration is because the lengths of cautions are going up. That, in part at least, is because softer tires shed more rubber and necessitate more cleanup. […]

Bubba Wallace

Elliott Sadler Runs Richmond: A Circle Closes

If you read my long-ago book The Physics of NASCAR, you know that the team I embedded with was Ray Evernham’s No. 19, driven by Elliott Sadler. Richmond reminded me that it’s almost 20 years since I did the research for that book. Elliott’s homecoming of sorts completed a circle for him — and for me. […]

passing

Lack of Passing at Indy: It’s Not the Car

Much talk this week about lack of passing at Indy and whether NASCAR a) should be racing there only with a different car and b) should be racing there at all. Let’s insert some actual data into the discussion. […]

The Chase/The Playoffs

How to Think About The Chase

With five races left in the regular season, I’m thinking about The Chase a lot. I’m wondering who is going to earn that top seed and the 100 extra points to start The Chase with. Coming in second puts you at a 25-point deficit before you’ve even run a race. […]

North Wilkesboro

2026 North Wilkesboro Race Report

The 2025 North Wilkesboro Race Report is a picture of domination by Joe Logano. Logano led 323 of the race’s 450 laps to win the first points-paying race at the track in 30 years. Let’s see how he did it. […]