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Citi Bike is struggling to keep up with a coronavirus-induced ridership spike, The Post has learned.

Ridership on the Lyft-owned bikes through the first 11 days of March was 517,768, a 67-percent increase compared to the same period last year, the city said Thursday.

But the company — which usually staffs up for the busy summer months — is floundering amid the increased demand, one field mechanic said.

The mechanic, a company employee for over a year, said stations were overwhelmed with bikes all week. He also claimed his supervisors had not given guidance on how employees can prevent the spread of the virus.

“There’s a lot more usage now. People aren’t able to dock their bikes. They’re just leaving them on the street and calling customer service,” he said.

Each Citi Bike is used for multiple rides per day. Coronavirus can stay on plastic surfaces like bike handlebars for up to three days, according to a US government report published earlier this week.

“I brought my own gloves and cleaning supplies, but the company hasn’t provided anything or given us or riders advice on how to keep these bikes safe,” the mechanic said.

On Friday, the Transport Workers Union, which reps Citi Bike employees, staged a brief work stoppage at the company’s Delancey Street yard to address the concerns of drivers who ship bikes across town in enclosed vans.

The company agreed to institute daily van wipedowns, TWU said.

“Management is struggling to get hand sanitizer and other cleaning supplies because of the enormous demand,” union rep Nick Bedell said.

A Citi Bike spokesman called claims that the company had not communicated to employees and riders about coronavirus hygiene “patently false.”

The spokesman said employees received multiple messages from the company this week advising them to follow CDC guidelines regarding the virus, and that workers were given rubber gloves in the last 48 hours.

Starting Monday, employees at valet stations will disinfect all bikes returned to their stations.

“Citi Bike has aggressively increased our cleaning protocols,” the spokesman said. “This includes disinfecting high-contact surfaces on bikes each time they arrive at depots, disinfecting high-contact surfaces on vans used to transport vehicles, and wearing gloves when handling bikes both in the depot and at valets.”