Would someone please tell me the difference between a type B and a type KM ER nut? From what I can tell there really isn't any difference.
Type B:
http://www.amazon.com/dp/B00DVTKI7C
Type KM:
http://www.amazon.com/dp/B00R11N8W8
Type B:
http://www.amazon.com/dp/B00DVTKI7C
Type KM:
http://www.amazon.com/dp/B00R11N8W8