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@GA2G
I thought I'd relay this to the forum.
I had a shit of a day with punctures, and failing tubes, and this is what happened.
I rode through some broken glass, that I saw too late, and punctured the rear. Got out my spare tube and changed it. Inflated with my Specialized Windpipe Shock. I pumped to 80psi with ease on the LOW setting, then continued to 120psi on the HIGH setting. There is NO effort in adding this extra air pressure. It feels similar to just beginning to pump up a flat tyre, when there is almost no resistance.
It does take a long time, but the high pressure is very easily achieved. Once I was on my way, I found out the valve on the replacement tube was faulty, and leaking. No more spares, meant walking home. Two and a half hours of lovely Sunday morning walking. Wonderful. Shit.
Anyway, I decided, with no more replacement tubes, I'd get the Capo 5 ready for later. I haven't been on the Capo in many months. Since winter actually. So I inflated the front to 120psi (Specialized Pro Quick Step). The rear, I inflated to 125psi, easily. Then the unthinkable happened.
The nozzle attachment when unscrewed, totally removed the tube stem. Instant deflation. All that effort wasted. I re-pumped using my slightly defective SKS TK1, but learnt that if the tube stem isn't extremely well secured, the Windpipe Shock will detach it.
But, as a test, it shows, that it pumps fast in LOW, and is good; then even better in HIGH setting. But it does take quite a long time to pump to high settings, but the effort is not even noticed.
Oh yes, the Specialized Pro Quick Step, is noticably faster than the Maxxis ReFuse, when both pumped to 120psi.