Comments on: The Latest Development in Bicycle Frame Pump Technology

By: pixeltan

pixeltan — Tue, 08 Dec 2009 07:10:19 +0000

But what happens if you don’t do skinny jeans and wear spandex?

By: Neo Displacer

Neo Displacer — Tue, 08 Dec 2009 02:28:40 +0000

more likely it’s the difference in volume and pressure. Kid’s balloon tires have more volume at lower pressure, IIFRC, you only pump them up to 30 some odd PSI. That fairly low, whereas an adult bike with 700c tires is very little air at 90 PSI. So a little leak means a great deal with skinny tires as with skinny jeans.

By: MR

MR — Mon, 07 Dec 2009 17:20:50 +0000

More weight?!

By: pixeltan

pixeltan — Mon, 07 Dec 2009 06:16:54 +0000

Opps, I swapped those around…what Jonas said.

By: stiiv

stiiv — Mon, 07 Dec 2009 03:59:57 +0000

You can still get some pressure for months. But now you notice if it’s down 10lbs or so.

By: jonas

jonas — Mon, 07 Dec 2009 02:53:56 +0000

Schrader valves are typically found on child bicycles. Most decent road bikes rims come with Presta valves. I don’t think that the lack of pressure is due to manufacturing differences, but possibly a climate difference.

By: pixeltan

pixeltan — Mon, 07 Dec 2009 02:33:51 +0000

I know what you mean. Its probably the difference between using a Schrader (what you see on road bike tubes) and Presta (what we had on our kid bikes) valve.

By: Mission Mistaken

Mission Mistaken — Mon, 07 Dec 2009 02:13:20 +0000

Reader question: When I was a kid, my bike tire pressure lasted all summer. Now they seem to lose air quickly and require constant pumping. I attest it to a vast chinese manufacturing conspiracy of cheap valves. Comments?