0
votes
1answer
66 views

Can I approximate how much air pressure is lost from disconnecting the hose?

I have a floor pump intended for mainly rather low pressure tires. It lets out quite a bit of air from the hose when disconnected. Can I calculate (approximately) how much air pressure is lost by ...
3
votes
2answers
1k views

what is the ideal presta tube valve stem length

I have noticed that presta tube valve stems come in various lengths. I always assumed the longer valve stems were to allow the use of deeper aero wheels. Why is it that many wheels in print ads seem ...
3
votes
3answers
964 views

Air compressor to fill up to 60 PSI

I am looking for an air compressor and wish to get one which is not under or over powered. I am looking at one in a catalogue which has the following attributes: 40 Litres/min free air delivery 1hp ...
11
votes
4answers
3k views

Should inner tube have excess length?

I've recently changed the default 700x35 tires and 35mm Schrader inner tube to 700x25 slicks with 25mm Presta inner tubes. However whilst fitting the new tire and inner tube, I noticed that the inner ...
16
votes
7answers
4k views

Does the plastic cap on a Presta valve serve any purpose once fitted to a rim?

I can see the use of the valve cap on a Presta valve when the tube is still packaged (it obviously stops the valve puncturing the tube), but does it do anything except look pretty (or not) once you've ...
15
votes
7answers
899 views

Which kind of tube valve is the best?

What kind of valve is the best one, a Presta valve (6mm) or a Schrader valve (8mm). Which has the best reliability, which one is easiest to fix a flat on?
31
votes
11answers
20k views

Can I use a Presta tube in a Schrader rim?

I keep losing pressure in my tires, and among other things, I'm looking at the valves in the tubes. It's an old mountain bike with 26 inch tires. Can I use Presta tubes on rims drilled for Schrader ...