According to ProFootballWeekly, the 49ers may have a problem getting Gore to sign a new contract.

From ProFootballWeekly:
The Niners realize it would behoove them to give ace RB Frank Gore a healthy raise before his contract expires after the 2007 season. However, the way we hear it, negotiations with Gore’s agent, Drew Rosenhaus, will hardly be cut and dried, since, regardless of Gore’s great success, they still consider him a 24-year-old running back in a 30-year-old’s body. Another valued young Niner with the same contract situation as Gore, starting ORG Justin Smiley, is a good bet to be re-signed first.