Torsion Springs

Measure the length of the unwound spring.
Do not measure the end caps of the springs. If your garage door has
left and right wound springs, measure both, as they may differ.

Next, Measure the Inside Diameter (ID) of the spring. 

Next, Determine the Wire Size.
Measure the length of 10 coils of the spring.
Example: 10 coils measures 2 1/4" = .225 wire size. (See chart below for examples)

If you currently have 2 springs on your garage door, you should replace both springs at the same time.

About City:

Arlington, TX is a city in Tarrant County, Texas (USA) within the Dallas–Fort Worth metropolitan area. According to the 2010 census results, the city had a population of 365,438, making it the third largest municipality in the Metroplex. Arlington is the seventh-largest city in Texas and the 50th largest city in the United States.

Located approximately 12 miles east of downtown Fort Worth and 20 miles west of downtown Dallas, Arlington is home to the University of Texas at Arlington, the Texas Rangers' Rangers Ballpark in Arlington, Cowboys Stadium, the International Bowling Campus (which houses the United States Bowling Congress, International Bowling Museum and the International Bowling Hall of Fame), the headquarters for American Mensa, and the theme parks Six Flags Over Texas (the original Six Flags) and Hurricane Harbor. The city borders Kennedale, Grand Prairie, Mansfield and Fort Worth, and surrounds the smaller communities of Dalworthington Gardens and Pantego. Arlington is the headquarters of the Nuclear Regulatory Commission Region IV.

Arlington is also the largest city in the state that is not a county seat.

Anglo-European settlement in the Arlington area dates back at least to the 1840s. After the May 24, 1841 battle between Texas General Edward H. Tarrant (Tarrant County is named for him) and Native Americans of the Village Creek settlement, a trading post was established at Marrow Bone Spring in present-day Arlington The rich soil of the area attracted farmers, and several agriculture-related businesses were well established by the late nineteenth century.
Cowboys Stadium - May 2009

Arlington Texas was founded in 1876 along the Texas and Pacific Railway. The city was named after General Robert E. Lee's Arlington House (in present-day Arlington County, Virginia). Arlington grew as a cotton-ginning and farming center, and incorporated in 1884. The city could boast of water, electricity, natural gas, and telephone services by 1910, along with a public school system. By 1925 the population was estimated at 3,031, and it grew to over four thousand before World War II.

The Arlington TX Chamber of Commerce was founded in 1945, by community, business, and civic leaders who believed there should be a single voice to speak for the City’s business community.

The rich history of the Chamber traces back to many of the city's most well known and beloved leaders, including three former Mayors who served as Chairman of the Chamber’s Board of Directors: Tom Vandergriff in 1949–1951, Harold Patterson in 1967-68, and Richard Greene in 1981-82. Today, the Arlington Chamber is one of the region's largest business federations representing business, trade association, and non-profit organization members, who collectively employ more than 60,000 individuals in Arlington, amounting to one-third of the local community workforce.

Large-scale industrialization began in 1954 with the arrival of a General Motors assembly plant. Automotive and aerospace development gave the city one of the nation's greatest population growth rates between 1950 and 1990. Arlington became one of the "boomburbs," the extremely fast-growing suburbs of the post-World War II era. U.S. Census Bureau population figures for the city tell the story: 7,692 (1950), 90,229 (1970), 261,721 (1990), and 359,467 (2004 estimate). Tom Vandergriff served as mayor from 1951 to 1977 during this period of explosive development. Six Flags Over Texas opened in Arlington in 1961. In 1972 the Washington Senators baseball team relocated to Arlington and began play as the Texas Rangers and in 2009 the Dallas Cowboys also began to play at newly constructed Cowboys Stadium.

Cathy Brown of The Dallas Morning News said in 1998 that "In addition, since Arlington's shirt collar is getting bluer, the flavor of the entire city is changing. The North Central Texas area now has Colleyville, Southlake, Grapevine to be what Arlington used to be. The decisions which produced the fade to blue were made too long ago for any of us today to alter."[6]

Arlington is the largest city in the world without a fixed bus route system of mass transit.