Skid block

Cornering loads can push the car down much lower to the road, which can be dangerous and so the skid block was introduced to counteract this.

Jarno Trulli in a Jordan was initially disqualified for plank wear after the 2001 United States Grand Prix but the Jordan team successfully appealed the decision to the FIA International Court of Appeal because a steward was absent when the original decision was made, and Trulli's 4th-place finish was allowed to stand.

[2][3] André Lotterer, Benoît Tréluyer and Marcel Fässler, driving the #7 Audi Sport Team Joest R18 e-tron, were excluded from the 2016 6 Hours of Silverstone after finishing in first place.

Post-race scrutineering determined that the skid block was less than the 20 mm dictated by FIA World Endurance Championship rules.

The ruling was a blow to Audi's hopes in the first round of the WEC season, handing victory to the defending champion Porsche team.

Lewis Hamilton and Charles Leclerc were disqualified for excessive plank wear in the 2023 United States Grand Prix after being randomly selected for a post-race inspection.