Hi Knot, thanks for the information. You're always helpful when it comes to these things.

I wear Specialized BG Sport mtb shoes with Frogs on my road bike and Tahos with BMX pedals on my mtb. I haven't noticed a knot developing in my achilles (or pain!) when I wear the Tahos, but I think I do remember having a tinge of discomfort with the mtb shoes last summer. Then of course it got really nasty on my first long ride of the season. So I'm wondering if I have to ditch the BG Sport shoes for something else? I'm going to try the heel cup thingies but in all honesty I think I will probably need orthotics. My right achilles decided to chime in with my bad right knee.

I was thinking about my shoes and I recall that there is one pair of Adidas that causes me the same problem. I don't have problems with Merrells.
My knot goes away usually in a day. Then when I wear certain shoes it comes back.

Ahhh, the joys of expired warranties.