http://www.biketiresdirect.com/pscma...us_700c/pp.htm

$35 a pop there. That is where I bought mine. I run 700c x 32 on my tour/commute bike. Nearly 1500 miles so far and they have been great. We do have goat head thorns here in Arizona, but so far they have not been a problem. I do also run Thorn resistant tubes, but not slime or liners.