More than a year later this pump is working fine, The dual pressure mode makes it a snap. For those that find it tedious to hold a pump on a presta stem and inflate a tire look for a pump with a hose connecter - myself included these days.The rubber seal on the pump head sheds a slight bit on the valve threads but should last a couple more years before replacement is needed. A very good light pump for your seat bag.
Small version which takes a little more time to operate fits into a 1 liter seat bag suitable for rides (shrader valves) with the grand kids. The medium version is frame mounted for commuting and adult rides. Both do their job very well. Holding and operating a pump on a presta stem has its drawbacks. The connection hose has answered the need for these old hands. Works great every time and the pressure relief for presta valves is an added bonus. Well designed product for the price and if you can find a sale all the better.
I was expecting this pump to perform with a Schrader valve but to my surprise it did not. Maybe the sample I received was defective. I am glad I found out now rather than while out riding with my kids and when one or both of them have a puncture. I have a Blackburn air stick for my road bike that works great. It appears to be well made and I like the appearance, maybe I will order another one later, but for now I will go with different brand.
Had the original silca frame pump eons ago that had the campy metal head w two prongs coated in rubber as well as a pump w plastic head. The current version is like the latter and my top tube was sized for a large pump.
I found the head of the pump slid down the head tube no matter the orientation of the pump. This was within a minute of install....no riding required. I called Silca support. No suggestion other than go one size up but...the new pump may not compress enough to fit the top tube. Of course that is what happened.
I don't think such an expensive product ought to have this issue. Bike is classic geometry.
I stuck on some handlebar gel at the junctions and the issue is fixed. I would have sourced an old campy head but pictures didn't show it would fit the pump.
Have not tried the pump but expect it to be good like in the olden days.