In his bespoke Italian suit and designer dress shoes, Cyril Therien gracefully weaves in and out of street traffic like a fish in water.

As soon as he pulls up to Pergola, the Flatiron hot spot du jour, women are practically lining up to speak to the 39-year-old IT specialist as he parks his wheels.

“This thing is a chick magnet,” he says.

When it comes to male midlife crises, the flashy sports car is old hat — at least to some New York men, for whom a skateboard is the preferred vehicle for recapturing one’s youth. (In Therien’s case, it’s black, with a rainbow underbelly.)

“I’m a suit — on a skateboard,” he says, explaining his appeal to the opposite sex. “Women like anything that’s unusual — and this is edgy without being over-the-top.”

Therien, who skateboarded as a kid, recently picked it up again as a convenient way to get around town. He estimates that he chats up two to three ladies a day thanks to his ride, and he even plans to launch a blog, “Dapper Deck,” that chronicles both his sartorial and sporty aspirations.

Still, not everyone at the bar is impressed.

“My younger brother used to skateboard,” says Christina Swift, of Bergen County, NJ. “He’s 16, but he gave it up when he started high school.”

Therien is one of a growing number of men with bank accounts and bills whose mode of transportation is the skateboard that most kids ditch in middle school.

Peter Frolich, co-owner of Aegir Boardworks, a sports shop in Dumbo, estimates that half of his business lately comes from middle-aged men. And now that ’80s-era graphics are being reissued, nostalgia is fueling big business, with grownups opting for designs that remind them of their childhoods.

“They’re lawyers, bankers, [guys who] work in media, in their 30s and 40s, with one or two kids,” says Frolich, who notes they tend to buy multiple boards priced at $250 apiece.

“I always endorse the midlife crisis,” he adds with a laugh.

“We get guys who are Alex P. Keaton — looking at them, you wouldn’t think they know anything about skating, but they do, and they’re nostalgic about it. It’s cheaper than a bike.”

And certainly cheaper than therapy.

“The nicest part is skating home at 12 at night with no traffic on the road,” says Jason Roberts, a 41-year-old private chef from Wallington, NJ, who transfers from the PATH station to his various Manhattan jobs via skateboard.

“It’s refreshing, it’s such freedom, but there’s still the stigma,” he adds, noting that he often encounters people whose “jaws drop” with surprise when they see him.

Still, he’s not giving it up: “It’s a different way to see the world. You take life a little slower. You appreciate your surroundings so much more on a skateboard.”

Just make sure you know what you’re doing, says skateboarding pro Steve Rodriguez, a 44-year-old senior vice president of creative services for ad agency Erwin Penland and founder of 5Boro skateboards, who once rode his board to dinner at Per Se.

“Culturally, there’s a fine line between the guy who can pull it off and the guy who can’t.”

Pity the poseur who rides his $1,000 electric longboard like an amateur. “You can always tell who’s in a midlife crisis,” says Jeremy Hill, 24, a lifelong boarder from Bed-Stuy. “They’re the guys who just have money to burn, who just buy the really expensive longboard, and try to show off, ‘I’m cool, just like you.’ ”