Joined: Feb 2005
Posts: 13,560
Likes: 44
From: Milledgeville, Georgia
Bikes: 2018 Black Mountain Cycles MCD,2017 Advocate Cycles Seldom Seen Drop Bar, 2017 Niner Jet 9 Alloy, 2015 Zukas custom road, 2003 KHS Milano Tandem, 1986 Nishiki Cadence rigid MTB, 1980ish Fuji S-12S
I have been using a Topeak Smarthead for several years on both presta and schraeder valves with no problems. I like it better than any other pump head I've used except possibly the Silca presta-only type. It sounds to me like you got a bad unit. Not typical of the product. Could it be something odd about the way you are using it?