I don't have to sit here and tell anyone that Silca makes extremely well designed, highly engineered and flawlessly executed products. This cyclist has used a Silca Impero plastic pump, since the 1970s, on many bikes, the new Impero Ultimate pumps better (which is saying a lot), looks to be indestructible, and weighs more. Unfair perhaps to compare it to it's predecessor, which was for decades by far the lightest pump with real capabilities. Fact is, it weighs in a bit heavier than the aluminum competition, too, but not by much. This mechanic has disassembled the new Impero Ultimate completely (for a baked-on paint job) and found, at 10X magnification, no flaws anywhere. It stays on the bike on rough rides. The five sizes will satisfy all but a very few. It is clearly capable of decades of service with it's replaceable wearing parts, so the price, which is higher than any other frame-fit pump that I have seen, seems reasonable to me. Couldn't find a reason not to give it five stars.
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.
The best frame pump on the market for good reason- Well-constructed, and after figuring out the 'no lever required' system to affix to a valve stem, inflates like a champ.. I also really dig the matte black, which looks good on the top tube!