Two longtime Dorchester tire businesses have formed a strategic alliance as one of the entities— Ashmont Tire— prepares for a major transition in the coming year. Dorchester Tire Service and Ashmont Tire are now being managed as one entity, according to Gary Saks of Dorchester Tire Service, based at 1160 Dorchester Ave.

The move comes after the Ashmont Tire property— located near the MBTA station of the same name— was acquired by Trinity Financial, Inc. to become part of a new mixed-use development.

Ashmont Tire remains open as the details of the development are planned. Mike Seigal, whose father opened the garage in 1945, said that the Ashmont location will likely remain open for business through 2016 as the new ownership group arranges for financing to construct a new six-story building on the site.

“As we combine our store efforts, we are able to capitalize on purchasing power, resulting in additional services and improved values for the dedicated customers of both businesses,” said Saks. Dorchester Tire Service, he noted, is Boston’s local Tire Pros dealer and will offer oil changes, state inspections and free shuttle service. It has been in business since 1962 and has been owned by the Saks family since 1982.

Saks— who is himself a third-generation tire industry manager— said that the alliance of the two former competitors is good news for consumers.

“Hopefully it will be a seamless transition,” said Saks. “This will give us the buying power to be able to keep offering competitive prices for our customers.”