Originally Posted by
jaltone
The SH-M315 have rubber "ventral fins" as you can see in the first photo. The road version SH-R315 doesn't have these rubber "ventral fins" as seen in the second photo. Other than this and other outer sole differences they are pretty much identical shoes.
SH-M315:
SH-R315:
Looks like a great shoe ... but it is WAAAY outside my budget.