Only $6 million of that deal is guaranteed in the first year and Bynum says he plans to be on the court when the season starts.
Bynum missed all of last season with knee issues after being traded from the Los Angeles Lakers to the Philadelphia 76ers. He says he weighs 305 but wants to get down to the 280s.
Bynum, 25, said getting his career back on track is the only goal.
"I worked really hard to get where I am, and I continue to work hard. I've had injuries in the past, and there is a lot to be said for people who think that way. But I think if you get to know me and you look at how hard I have worked to get where I am now, that's kind of nonsense," Bynum said to the Cleveland Plain Dealer.
Bynum had career highs of 18.7 points and 11.8 rebounds in 60 games in the 2011-12 season with the Lakers and has averaged 11.7 points and 7.8 rebounds in his career.SI WIRE: Pistons sign two draft picks