The name on everyone's lips in athletics circles both here and around the world is Sam Ruthe. 

The Tauranga 15-year-old's sent the running world into a spin by becoming the youngest athlete to ever run a sub four-minute mile - clocking 3:58.35 at the Mt Smart track in Auckland. 

Nick Willis is one of our very best middle-distance runners, and joined Piney to discuss Sam's achievement and his future in the sport. 

“It really sets the stage for a really exciting and promising future ahead.” 

LISTEN ABOVE 

• "Felt amazing": Kiwi runner becomes youngest ever to break four-minute mile
• "Shockingly quick": Ben Ruthe on his son's history-making 4-minute mile