Well, the difference is measurable when you're using a lightweight tire. It's easy to tell the difference between a standard tube and a thorn resistant tube. Those things feel like you're riding on a garden hose.
Either I'm missing something or I didn't state my question clearly enough. What I was asking was not if there are sensory differences between riding with super thin latex tubes and heavy butyl rubber tubes but whether or not there is any appreciable difference between the two in terms of rolling resistance when used under the same conditions, i.e., same tire and same inflation pressure.
Well, the difference is measurable when you're using a lightweight tire. It's easy to tell the difference between a standard tube and a thorn resistant tube. Those things feel like you're riding on a garden hose.
Either I'm missing something or I didn't state my question clearly enough. What I was asking was not if there are sensory differences between riding with super thin latex tubes and heavy butyl rubber tubes but whether or not there is any appreciable difference between the two in terms of rolling resistance when used under the same conditions, i.e., same tire and same inflation pressure.
The most important factor that governs rolling resistance is the amount of rubber in the tire and tube combined. If going from a lightweight latex tube to a thick butyl tube increases the combined amount of rubber by say, 25%, one should expect rolling resistance to increase by about the same amount. -- terry morse Palo Alto, CA http://bike.terrymorse.com/
Well, the difference is measurable when you're using a lightweight tire. It's easy to tell the difference between a standard tube and a thorn resistant tube. Those things feel like you're riding on a garden hose.
Either I'm missing something or I didn't state my question clearly enough. What I was asking was not if there are sensory differences between riding with super thin latex tubes and heavy butyl rubber tubes but whether or not there is any appreciable difference between the two in terms of rolling resistance when used under the same conditions, i.e., same tire and same inflation pressure.
The most important factor that governs rolling resistance is the amount of rubber in the tire and tube combined.
Wrong. The tube is compressed by the air pressure against the tire cord and only the tire patch between the road and the cord is compressed. Common sense 101. Do I really have to draw a picture? Bill
If going from a
Quoted message said:
lightweight latex tube to a thick butyl tube increases the combined amount of rubber by say, 25%, one should expect rolling resistance to increase by about the same amount. -- terry morse Palo Alto, CA http://bike.terrymorse.com/
The most important factor that governs rolling resistance is the amount of rubber in the tire and tube combined.
Wrong. The tube is compressed by the air pressure against the tire cord and only the tire patch between the road and the cord is compressed. Common sense 101. Do I really have to draw a picture?
A picture would be nice, because what you are writing makes no sense to me.
When inflated, the tube and tire casing are essentially one. When the contact patch deforms, the tire and tube deform together. Compression has little to do with rolling resistance, which is mainly caused by flexure and release of the rubber in the contact patch. -- terry morse Palo Alto, CA http://bike.terrymorse.com/
The very bottom of the tire is flat, or as flat as the surface underneath. The rest of the tire is round. The rolling resistance depends on many variables, but mostly the ease by which the tire changes from flat to round. If the tire could be pumped up to a pressure whereby the tire would remain completely round there would be less rolling resistance.. The more flat surface, the more resistance. If your tire spreads out more laterally or linearly you have to peddal harder to go the same speed as someone with a tire that is up off the road.
The very bottom of the tire is flat, or as flat as the surface underneath. The rest of the tire is round. The rolling resistance depends on many variables, but mostly the ease by which the tire changes from flat to round. If the tire could be pumped up to a pressure whereby the tire would remain completely round there would be less rolling resistance.. The more flat surface, the more resistance. If your tire spreads out more laterally or linearly you have to peddal harder to go the same speed as someone with a tire that is up off the road.
This tire thing doesn't seem to want to die anytime soon, but running any tire at it's maximun is the way to get the tire derormity down to the minimum rolling resistance. How about 200 PSI tires on a 700 type tire.It can be done if the manufacturers decide that is the new hot trend. Bill B
Ugh, please no. That would be the roughest riding tire. As the rolling resistance graphs show, there's a diminishing benefit to increasing pressure above a certain point. -- terry morse Palo Alto, CA http://bike.terrymorse.com/
