James wrote:
On 17/01/17 04:49, Joerg wrote:
On 2017-01-04 22:55, Jeff Liebermann wrote:
On Wed, 04 Jan 2017 11:59:28 -0800, Joerg
wrote:

Try these:

https://www.amazon.com/Sunlite-Thorn.../dp/B000BMT2TM


I never looked back. Reviews are mixed and sometimes they do have poor
valve attachment. Also, some are thick only towards the running surface
and that is less protecting than thick all around.

Thanks. I should probably get something like that instead of the
cheap tubes that I've been buying. Note that the cheap tubes seem to
leak without any riding. I've built wheels, applied pressure, and
watched the pressure drop slowly over a period of several days. The
leaks are small, difficult to find, tricky to plug without a patch,
and very irritating.


Yup. Standard bicycle tubes are usually junk. Would you accept it if you
had to pump up the tires of your car every two weeks? Yet most cyclists
think this is "normal".



I prefer pumping up tyres on my road bike every couple of weeks to
riding a slug.


I don't mind topping off my tire pressure daily just to be sure.
Admittedly a bit anal but part of my usual get ready for my ride routine.
The idea of two pounds worth of tubes to avoid putting air in my tires
doesn't parse at all.

MTB tyres can go much longer between pressure checks because the initial
pressure is usually about half that of road bike tyres and there is more
volume of air.

Car tyres don't usually have a tube. They are tubeless, and the thick
and heavy tyre makes the seal, and the initial pressure is usually much
less than that of a normal MTB tyre and there is a huge volume of air by
comparison.





--
duane