Learning About Heel-Toe Drop for Shoes

With Nike’s recent Terra trail running line, the Swoosh is emphasizing the 4 mm differential between the toe and heel. I’ve never seen this type of detail before in typical Nike product information. So what’s with this?

Here is some useful information I found on this subject.

• Heel-Toe Drop or Offset: What Does it Mean in a Running Shoe?
• Why heel-toe drop can mean different things for different running shoes and different foot strikes
• Can someone explain toe/heel drop in shoes?

But like the last link mentions, it all depends on you and your feet. So best to try the shoes yourself. Zappos, calling Zappos…