INDIANAPOLIS — The exterior of the Arrow McLaren merchandise trailer still stands out with its world-famous papaya orange primary color.

But inside is a distinctly new look for the team at Indianapolis Motor Speedway this month.

An hour before the green flag of last Saturday’s IndyCar race on the Indianapolis Motor Speedway road course, fans lined up to buy shirts, hats and flags honoring what’s been deemed “The H1100” – Kyle Larson’s attempt at winning the Indy 500 and Coca-Cola 600 in a joint venture between Hendrick Motorsports and Arrow McLaren.

But the gear options at the team’s infield trailer went well beyond that. A vast selection of Larson’s dirt racing merch and NASCAR-branded apparel was also being offered.

Roughly half of the IndyCar team’s trailer display space was devoted to the 2021 NASCAR Cup Series champion.

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“I haven’t been out there yet to see it, but my parents, just (seeing) the exterior of it, they were like, ‘Man, if I was your teammates, I’d be pretty pissed because it’s basically all you,’ ” Larson said with a laugh Wednesday morning at the Brickyard. “It seems my merchandise has been going really strong in the NASCAR stuff, so I’m excited to kind of see how it is here at Indy because especially like a one-off thing, I think it should be very popular seeing the numbers from the road course event, when I wasn’t even here, is pretty good.

“So yeah it’s pretty exciting. I feel like I’ve signed a bunch of diecast cars already and a bunch of T-shirts. So as the crowd gets more massive it should be pretty interesting.”

IMS officials have said this week that the 108th running of the Indy 500 has fewer than 10,000 tickets remaining in its 257,000-seat grandstands for the May 26 race. The event is tracking for its largest crowd since 2016 (which sold out for the 100th running), and the attendance spike largely could be attributable to Larson. Last year, Roger Penske told NBC Sports that he expected well more than 300,000 for the 2024 Indy 500 and cited Larson as a major reason.

Acknowledging that it’s good for IndyCar, Arrow McLaren star Pato O’Ward — the series’ most popular driver and a big merchandise seller in his own right — doesn’t mind having the attention usurped by Larson.

“I’ve got my own (merchandise) store, so I’m all right,” O’Ward, who drives the No. 5 Dallara-Chevrolet, deadpanned. “No, I mean, I guess he’s a pretty big deal right? I think it’s cool what he’s doing. I would love to do that in the future (and run the Coke 600 after the Indy 500). I want to get a win here first, then I can think of doing that.

“But I think it’s cool. I haven’t gone to the trailer, but I wouldn’t be shocked.I know they made a big deal out of it, and I think they’re just capitalizing on the opportunity, right? That’s what you’ve got to do, but it’s all right. I see a lot of 5 shirts walking around, so I don’t think it’s hurting us.”

It certainly has been a boon to Larson’s appeal, though. While Larson admittedly “bored to death” by rain delays (after a nearly total washout Tuesday on the opening day of Indy 500 practice, track drying finally began midday Wednesday in hopes of a session that would start late afternoon and run until 7 p.m.), his spirts have been buoyed by the interest. There was a similar groundswell in 2014 when Kurt Busch was the fourth and most recent NASCAR driver to attempt “The Double.”

“I think it’s just that the fans kind of want to follow it and support it, and I’ve felt that so far,” Larson said.

The sports books also have connected with the excitement. Some have listed Larson with the second-best odds behind defending IndyCar series champion Alex Palou (who finished fourth in last year’s Indy 500 from the pole).

Larson also was bemused to be listed ahead of six-time IndyCar series champion and 2008 Indy 500 winner, Scott Dixon.

“Yeah, that’s crazy, but that doesn’t make any sense to me,” he said. “So I think people are wasting their money but maybe not. I guess I hope to not have people waste their money on me, but yeah, that’s insane.”

The prospect of winning as a rookie might not seem so outlandish when considering that all four of Arrow McLaren’s Dallara-Chevy entries qualified in the first four rows last year. O’Ward also led at least 17 laps in each of the past three Indy 500s.

So could Larson become an IndyCar version of Shane van Gisbergen, who stunned NASCAR by winning his Cup debut in the Chicago Street Race?

Palou said it’s possible and added that a victory by the interloper wouldn’t reflect badly on IndyCar.

“It’s Kyle Larson; I don’t think it would hurt,” Palou said. “If Kyle Larson wins, it’s Kyle Larson, so whatever. He wins everything. So I don’t think it would make us look as idiots. It’s not that I’m like, ‘Oh yeah, if he wins, that’s cool.’ I don’t want him to win. But I think he will be there, for sure.”

Arrow McLaren teammate Alexander Rossi, who was the most recent rookie to win the Indy 500 in 2016, already ranks Larson as among the world’s greatest and said an Indy 500 win would put him “on the same level” as three-time defending Formula One champion Max Verstappen.

Rossi said a win by Larson would sting for his IndyCar peers just as van Gisbergen’s victory did for the Cup field at Chicago last July. Chase Elliott said then that van Gisbergen “made me look bad,” and Larson openly wondered if van Gisbergen “thinks we all suck or if we could actually like compete, if we weren’t really that bad” on street courses.

“It would be the same thing that the Cup guys felt,” Rossi said of a potential Indy win for Larson. “We know he’s good, but for him to come into our world, and in his first event win, that doesn’t reflect well on us. That’s kind of just the competitive nature of it, and that’s the reality of it. That being said, all drivers feel that we need to win this race and that involves beating everyone, including him, so it doesn’t really matter.”

For the record, Larson said he “really haven’t got myself to think about winning at this point” and noted that van Gisbergen’s victory came on a street course — where he had massive experience vs. virtually none for the NASCARCup Series stars. “So I think if I was to win (the Indy 500), it’d be lucky more than skill,” Larson said with a laugh. “But I’m not sure.”

The primary objective is just turning laps once the track was dry for the first time this week.

In addition to extending practice to 7 p.m. Wednesday, IndyCar also moved up the start of practice by two hours Thursday to 10 a.m. ET.

On Friday, cars will be equipped with a turbo boost equivalent to 100 horsepower that will be used only for qualifying on Saturday and Sunday (bringing top-end speeds into the 240-mph range).

For Larson, it means there still is a lot to learn the next few days before he even could consider focusing on a win.

“I don’t think that I would do very good at this point,” Larson said when asked about his current Indy 500 confidence level. “For sure, I would learn a lot throughout the race, but I would be starting further behind now then I will be next week. So there’s still a lot of things that I want to get done over the course of this week to prepare myself for next week. If it would hurry up and just stop raining, so I can get out there.”

INDIANAPOLIS — Kyle Larson hardly had a chance at redemption after “probably the worst night” in his storied sprint car career.

But as his May officially began at Indianapolis Motor Speedway, his Monday night miscues hardly mattered to his new open-wheel peers, who remain just as impressed with the racing superstar who flipped in a heat race and failed to advance from the C main at Kokomo Speedway (about 90 minutes north of the Brickyard).

The 2021 NASCAR Cup Series champion, who is attempting to become the fifth driver to run the Indianapolis 500 and Coca-Cola 600 in the same day, was back at it Tuesday morning in Indy driving the No. 17 Dallara-Chevrolet for Arrow McLaren, which is fielding the car in a joint partnership with Hendrick Motorsports.

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Larson turned only two laps before the skies opened less than 25 minutes into the opening day of practice for the 108th Indy 500, and the rest of the eight-hour session was canceled. The limited track time comes on the heels of rain washing out nearly all of a two-day test at IMS last month.

Of the past 24 hours of scheduled practice for the Indy 500, barely two hours have been completed because of inclement weather. That means Larson has made only 49 laps on the 2.5-mile oval this year when he probably should have at least a few hundred — but he still was enthused about finally kicking off a project that was announced Jan. 12, 2023.

“It’s good to finally have the Indy 500 here,” he said. “It’s been a lot of waiting. Just happy to get this experience underway. The weather is getting in the middle of things today, but once we get through today, it should be good.”

It certainly was better than his latest moonlighting venture in the High Limit Racing series that he co-owns. Larson qualified poorly and then barrel-rolled into a crash after being “desperate and overly aggressive” trying to finish fifth and transfer to the main event.

“Yeah, just a bad night,” he said Tuesday morning in the pit lane at IMS. “Probably the worst night I think we’ve ever had sprint car racing with (car owner) Paul Silva. So yeah, that was disappointing. … I just ran us out of room and flipped myself.”

🚨 @KyleLarsonRacin barrel rolls down the backstretch at @kokomospeedway @HighLimitRacing #highlimitracing pic.twitter.com/gBJOSG1Yvp

— FloRacing (@FloRacing) May 13, 2024

A.J. Foyt Racing’s Santino Ferrucci, who finished third in last year’s Indy 500, has gotten to know Larson as a part-time NASCAR driver in 2021-22 and as an entrant at the Chili Bowl, the famous dirt race for Midget cars in Tulsa, Oklahoma, that Larson has won twice.

Ferrucci once got knocked out by a flip at the Chili Bowl and “wasn’t right for a good three, four months” but said the impact was softer with a winged car such as Larson’s Monday night.

He gave Larson credit for quickly getting back on the horse at Indy.

“I’d love to be out there running Kokomo and doing all that stuff in dirt racing, but I just don’t have the ability to not be a danger to myself,” Ferrucci said with a laugh. “I didn’t grow up dirt racing, so it’s going to do more harm for me than good, but for someone like that that just lives that lifestyle, I mean, it’s damn impressive. He’s a true racer.

“He’ll be good (at the Indy 500), man. I mean, he likes a loose race car. I think once he gets the understanding, which he’ll pick it up quick; man, he’s a racer. He’ll be fast. So it’ll be just about keeping him tame.”

During his brief time at the Brickyard last month, Larson turned the second-fastest lap in the Indy 500 test behind defending winner Josef Newgarden. Though he chalked it up to “a tow” (Indy 500 terminology for following in the draft of another car and increasing your speed), Larson still has done enough to impress the rest of the field. And in Arrow McLaren, he will be driving for a team that qualified all of its cars in the first three rows of the 33-car field last year.

Graham Rahal, who is slated to make his 17th Indy 500 start, said there’s “no doubt” that Larson could become the first to win the Indy 500 and Coca-Cola 600 (none of the four drivers — Tony Stewart, Kurt Busch, Robby Gordon and the late John Andretti — has finished higher than third in either race).

“It’s not like he’s in a slow car here, and 90 percent of the Indy 500 is having a fast car, maybe more,” Rahal said. “So I think I think he’s going to be in a great position. Obviously, we know the Hendrick cars are damn good too.

“But also Kyle is supremely talented. He’ll probably even tell you I texted him maybe four or five years ago saying I’d love to see him get an opportunity to come and run the 500. Obviously, with (Rahal Letterman Lanigan Racing) being a Honda, that was never going to be a reality for us no matter what. But he’s got all the talent in the world. It wouldn’t be a shock, particularly in the situation with McLaren, that he comes in and is very freaking good.”

Four-time Indy 500 winner Helio Castroneves noted that Larson also has the benefit of being advised by 2013 Indy 500 winner Tony Kanaan, the sporting director at Arrow McLaren.

“He has amazing experience and people in his corner,” Castroneves said. “One of them is Tony, and that’s going to help tremendously to speed up that process. He’ll be good. He definitely understands the game, and it’ll be fun to battle with him.”

Larson was ready to take it slow with the learning process, though — perhaps especially after his unusually embarrassing Monday night in a sprint car (“I suck,” Larson bluntly told a trackside reporter at Kokomo).

Shortly after exiting his car when the rain came to IMS, he was anticipating how many questions he would have over the next five days. Wednesday’s practice session was extended by two hours to 10 a.m.-6 p.m.

There will be six-hour sessions Thursday and Friday before qualifying Saturday and Sunday, which Larson will sandwich into jetting back and forth to North Wilkesboro for the All-Star Race.

“Every time I leave pit lane, there’s something new that clicks or a question arises,” he said. “I’m sure it’ll be that same way the next few days, then eventually you’ll get comfortable and fine-tune your brain to be more relaxed. Right now, everything is happening kind of quickly. Just pit lane stuff, like it’s so busy, and my awareness is super high. But I think as I get more comfortable with that, it’ll just become second nature, hopefully, and all the on-track stuff will hopefully be fine.”

Nate Ryan has written about NASCAR since 1996 while working at the San Bernardino Sun, Richmond Times-Dispatch, USA TODAY and for the past 10 years at NBC Sports Digital. He is the host of the NASCAR on NBC Podcast and also has covered various other motorsports, including the IndyCar and IMSA series.