NASCAR explains the rear bumper cover rule

Fans and drivers were confused as to why Kyle Busch was allowed to race at Bristol without a rear bumper

Kyle Larson: “I was surprised NASCAR let him race without a bumper cover like that.”

Kyle Busch doesn’t need an introduction. He came out with a bang at Bristol Motor Speedway.

Bristol Motor Speedway installed trackbite on the inside groove of the high banked conrete oval. That application is designed to provided added grip to grooves of the track that aren’t generally preferred. However, it’s also activated by heat.

Lap 2, Kyle Busch lost traction while running in the trackbite. He slid up the track and clipped the left rear of Ryan Blaney. Kyle Busch went around in front of the field in turn 4. Truex, Suarez, Gaulding, Micdowell all made direct contact with the #18.

“Everybody hit Kyle. The dude that started last hit Kyle,” Brett Griffen, spotter for Clint Bowyer stated after the wreck.

Despite contact from 4 cars, the #18 was still rolling. All four fenders were dented, the door was caved in, the deck lid was twisted and the rear bumper cover was knocked completely off. On lap 2, the precision built race car was now correctly shaped for door banging event in Bristol, Tennessee.

“All the rear sheet metal’s KO’d,” Tony Hirschman radioed to the #18 box.

“It definitely looks salvageable. Um, we’ll cut that bumper cover off,” Adam Stevens, crew chief for the #18 responded.

Kyle Busch - Rear bumper cover
Kyle Busch – Rear bumper cover

Kyle Larson

However, the fans were confused on the call by NASCAR. How was Kyle Busch allowed to race without the rear bumper cover? It wasn’t only the fans, the drivers had some questions as well…

“I could see his car was pretty destroyed. I was surprised NASCAR let him race without a bumper cover like that,” Kyle Larson said after his runner-up finish at Bristol Motor Speedway.

“I’m pretty sure in the rulebook it says you can’t do that. I remember I got mine knocked off at Fontana a couple years ago and they made us tape a new one on.”

“I don’t know if that’s the fairest thing. Maybe because it’s a short track they think aerodynamics aren’t important.”

“But, he was able to drive through the pack and put on a pretty good show for the fans. He put on a good show I’m sure,” Larson concluded.

Damage repairs relegated Kyle Busch two full laps down to the leader. And at one point he was 10 feet from going a 3rd lap down. However, Kyle Busch made both laps back and drove to the 3rd position.

A late race crash with Martin Truex Jr was followed by 3 wide, door banging racing. Kyle Busch ended up cutting a tire following the contact. He went on to finish in the 20th position but he certainly put on a show.

Kyle Busch - Bristol Motor Speedway crash
Kyle Busch – Bristol Motor Speedway crash

NASCAR comments on the rear bumper rule

NASCAR is here to set the record straight. Steve O’Donnell has explained the rules regarding the rear bumper cover. Honestly, it’s a rule I didn’t understand either. So, most of us will probably learn something new here.

“There is no bumper cover issue really. It’s clearly spelled out in the rulebook which tracks you have to have which parts, NASCAR Senior Vice President of Competition Steve O’Donnell stated via ‘The Morning Drive’ on Sirius XM NASCAR Radio.

“The reason the bumper cover has to be on at a mile and a half or a high speed race track is the fact that that’s a very important mechanism to the lift off of the car. If the car should spin around backwards and want to lift off the ground.”

“It’s a safety reason why they have to be on at the mile and a halfs. Obviously, we don’t face that problem with the speeds at the short tracks. That isn’t a part that’s called out in the rule book.”

“It’s clearly spelled out when we made the damaged vehicle policy. As the feedback from the teams was put into that as well as our knowledge of the aerodynamics and the safety aspect. Hood flaps, roof flips and the rear bumper all figure into the lift off speed.”

“That’s why at a mile and a half there’s more pieces that have to be on and fully functioning than at a short track.”

Kyle Busch
Rear bumper cover crash video

More

Related: Fan confronts Kyle Busch after he wrecked Martin Truex Jr at Bristol Motor Speedway

Related: Kyle Larson and Kyle Busch beat the bumpers off at Chicagoland Speedway

Related: Kyle Busch’s truck drove terribly and the splitters are absolutely horrendous

Related: Kyle Busch had a tough day

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Kyle Busch | Steve O’DonnellBristol Motor Speedway | NASCAR

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