Trim and discard tough stalks from centers of collard and kale leaves; stack leaves, and roll up, starting at 1 long side. Cut into 1/4-inch-thick slices. Toss collards and kale with cranberries and Lemon Dressing in a large bowl. Cover and chill 1 hour.
Toss together pears and next 2 ingredients just before serving. Toss pear mixture, radicchio, pecans, and bacon with collard mixture. Serve immediately.