Posted elsewhere, they have tightened regulations to clamp down on the "franken-shoes".
40mm stack height maximum
One carbon plate only (some shoes were including a second).
Must be on sale to the public for < 4 mths before the race in question
Puma makes a shoe that's non-compliant with the above (two plates, not sure about the stack height), for what it's worth.
Posted elsewhere, they have tightened regulations to clamp down on the "franken-shoes".
40mm stack height maximum One carbon plate only (some shoes were including a second). Must be on sale to the public for < 4 mths before the race in question
Puma makes a shoe that's non-compliant with the above (two plates, not sure about the stack height), for what it's worth.
As someone whose tallest shoes have a 10mm stack heigh, 40mm is crazy high!
nope, nike vaporflys are super popular. There are usually limits on stack height for many marathons though.