Competition for an aluminium framed bike

[Piemaster]

I can't see the the air in a bike frame weighs very much, so replacing it with a slightly lighter gas or removing it completely won't make much of a measurable difference on your average bathroom scales. Despite what the weight weenies may claim.

 

[Hover Fly]

Next week on Cycle Chat, "the fun and friendly online cycling community":-

Piemaster takes reported sightings of the puncture fairy very seriously indeed.

 

[Piemaster]

Puncture fairy. Pah! I spit in her eye and crush her bones beneath my M+.
Her mates then take revenge on the rest of the families bikes.

I am actually trying to work out the weight difference between air and helium for my bike.
Am at present draining the air out of my bikes frame into a jug in order to get an accurate measure of its volume. I'll let you know how I get on.

 

[Hover Fly]

Don't forget to allow for height above sea level and temperature.