NEWRY — For this weekend’s Trek Across Maine, Team athenahealth is riding for the American Lung Association and former teammate David LeClair who lost his life during last year’s ride.

“Many of us have ridden in the past simply for the joy of riding as a team of fellow athenaists,” a message on the team Trek page states. “Many of us have had a personal reason for riding, such as having asthma or having lost someone to a lung disease.

“During the 2013 Trek Across Maine, we lost a friend and member of the team — David LeClair.”

LeClair, 23, of Watertown, Mass., was riding with his employer’s team when he fell into the path of a passing tractor-trailer, Maine State Police said. LeClair was killed instantly.

State police Lt. Walter Grzyb said Monday by email that their investigation showed the crash resulted from a combination of one or more of the following factors:

* LeClair had only one hand on the handlebar while drinking from a water bottle.

* LeClair may have struck the wheel of the cyclist directly in front of him.

* Air turbulence created by the passing truck.

“Any one of these factors, or a combination of one or more of them, resulted in LeClair losing control of his bike and falling into the path” of the 22-wheeler hauling corn feed from Colebrook, N.H., to Augusta, Grzyb said.

The truck, which is owned by Transport Serge Beauregard of St. Jacques Le Mineur, Quebec, was being driven by Michel Masse-Dufresne of Quebec.

“Additionally, there is no evidence at this time that there was any contact between LeClair and the passing truck until LeClair lost control of his bike and fell into the path of the truck,” Grzyb said.

The bike was not damaged and was not struck by the truck, he said.

“Witness statements, specifically from the riders behind LeClair, indicate that there was at least 2.5 to 3.5 feet between LeClair and the truck as it was passing,” Grzyb wrote.

Though marred by LeClair’s death, the trek continued on last year, and donations poured into LeClair’s Trek account, far surpassing his goal to raise $500.

“This year, it’s personal for all of us,” the team message states. “This year, we ride for David and all those that struggle for Clean Air.”