Silca Pumps

So Solobreaks little silca pump find the plunger leather game was fun.

and well figure its time to document the various permutations of the pump.

There is and was only one original silca pump head:
Kinda small picture but ya get the idea. Simple barbed fitting rubber valve/gasket. Pump and fill tire.

They went from there to this POC design at somepoint:
Why? Well because the beauty of that chuck is that its reversible. Kinda like the Zefal HPx things. Ya take it apart, fiddle with two or three internal bits and you can fill either type of valve. Problem was, the presta side wore out way faster than the orignal and the schreader side sucked ass (still had to screw the bitch on). And the screwing on of it meant the barbs were spinning inside the hose... meaning ya ain't putting 150 psi in your 18c TT tires.

But it would be remiss not to mention the Disc wheel head. Available for a long time kinda always... Pretty much the only way to put air in your solid disc wheels.
Then the final/or 'best' version they came up with.
BTW images courtesy of GOOGLE image search... mostly these guys: http://www.lickbike.com/

So with this new one... the Old Presta head is back but its threaded in schrader fashion, and the schrader side actaully spins on the barb so the hose doesn't get all chewed the hell up.

I like this final version. Worth buying to resurrect an old Silca pump with the shitty switchable style brass head? Debatable. I'm sure the new pump head is probably as much $$ as a cheap ass floor pump that works well in all but bike shop/pro racer environments.

Here's the pro version of the images... all together... notice they make a Schrader to Presta adapter... pretty cool eh? maybe that's the way to go instead of the other way around eh?

I dunno whats up with the black parts other than its prolly not brass anymore... 2220 is the schrader to presta adapter...

link to Silca is here.

The foot thing looks to be changed from the old school metal toe pinching stuff... And don't forget to take a look at the 60s catalog... I'm wondering if Zoo can figure out how to turn the pages LOL

Think about racing at Plymouth and maybe even Lowell. Might be nice to get a double weekend in to see how the legs will react... at least before the RI double and "Nats"

We'll see if scheduling allows it.

Does anyone know the critical pressure and temperature of water and CO2? Or want to hazard a guess why we use CO2 as a Critical point drying fluid instead of water?

call it your science moment...

Peace