Jason James Martin, 32, of Boise and Martin Adam Hernandez, 23, of Nampa, are accused of transporting two pounds of methamphetamine inside a spare tire of a rental car into Ada County from California in February.
A confidential informant tipped off police in January that the pair might be using a rental car to bring drugs back from California.
Police spotted the rental car heading west toward Boise on Interstate 84 on Feb. 21. They observed the pair and a woman passenger who was not arrested in the case retrieve Martin's car from the Boise Airport parking lot and later load personal belongings and a spare tire from the rental car into Martin's car at a nearby gas station.
An Ada County deputy stopped the car in Meridian after Martin failed to signal a turn. Another deputy with a drug-detecting dog was called to the scene and the deputies found a small amount of marijuana and the dog alerted on the spare tire for the presence of drugs.
The tire was taken to a local tire shop to dismount the tire and deputies found two one-pound packages of meth packed inside the tire.
A federal grand jury indicted Martin and Hernandez on charges of conspiracy to distribute methamphetamine and possession of meth with intent to distribute.
According to plea agreements filed last week in federal court, Martin and Hernandez plan to plead guilty next Thursday to the conspiracy charge. The second charge against each will be dismissed in exchange for their guilty pleas, according to the agreements.