Stephen Awrote a review of Cutter 26in Wide Premium MTB Tubes - 4 Pack on September 26, 2011
don't touch these with a ten-foot pole, they're total garbage. the stems are so poorly constructed that when you try to unscrew the pump from them the whole stem comes apart! if i didn't have a multitool with pliers on it with me yesterday (to clamp it back down) i would have been totally stranded in the tahoe wilderness. save money elsewhere and buy good tubes, and if you ever meet Mr Cutter, please kick him in the nuts for me.