Earlier this week, we reported the rumor that the Indy Racing League was close to reaching a deal to absorb the Champ Car World Series, thereby unifying major league open wheel racing in the United States into one series.

Today, the groups made the official announcement. The rumors were true. The papers have been signed by all of the principals, including IRL CEO Tony George.

The two series will be combined for the 2008 season. A press conference to announce the details has yet to be scheduled.

Rumors, however, have the Champ Car teams switching to the Dallara chassis used in the IRL and running according to IRL rules. The rumors also have the merged series opening its first practice later this month a Homestead speedway in Florida.