Using two tubes .

[ari]

Before i drill a second valve hole , has anyone used 2 tubes in the rear tyre/tire? im thinking 2 light weight tubes which will be lighter than a heavy duty tube filled with sealant , i am a cheap arse so it will be a cheap thing to do . Not really sure about the pressures eg 2x10psi=20psi or 2x20psi=20psi????

 

[Ark]

I'd just skip breakfast if you want to save a few grams

 

[Bones]

I reckon you have more chance of peeing in the Queens handbag than that idea working!

 

[RustyIron]

Don't do two tubes. At speed, it will create harmonic vibration that causes the derailleur to jump around. What you need is an odd number of tubes. That's why one tube is so popular. If you're going to do anything, put in THREE tubes. Aside from the vibration damping, three is 50% better than two.

 

[fasterjason]

Don't do two tubes. At speed, it will create harmonic vibration that causes the derailleur to jump around. What you need is an odd number of tubes. That's why one tube is so popular. If you're going to do anything, put in THREE tubes. Aside from the vibration damping, three is 50% better than two.

You can have two identical half-sized tubes inside the same tire, but they must spin in opposite directions so that they do not violate the Pauli exclusion principle. Otherwise (at the macroscopic scale) your wheel becomes unstable and undergoes drastic volume reduction, i.e. a flat tire.

Jokes aside, I want some of what OP is smoking.

 

[RustyIron]

You can have two identical half-sized tubes inside the same tire, but they must spin in opposite directions

Dude! You had me laughing out loud here. Wife and dogs think I've gone nuts.