as above and would it make any difference?

Yes. The main difference I noticed was when jumping as the bike starts to tip upside down.

all the squeaks and rattles from your bike get really high pitched, too.

It made my tyres make a high pitched squeal when they went over rocks, 😆 more off-putting than a hope hub

My mate tried helium once. He spoke very highly of it.

My mate tried helium once. He spoke very highly of it

Boom Boom

Hmmm say 6bar,

volume = 6 * (0.023/2)^2 * pi * (0.622 + say 0.10) * 2 * pi

weight = density * volume.

Simples.

A huigh pressure vaccum would be even better though.

I’ve thought about it, but you could go all the way and pressurize shock/forks also.

As long as you don’t mind re-inflating them all the time. Helium is going to leak much faster than any other gas (even hydrogen), but it should save you some weight.

It might even save you more weight than switching to Beryllium bottle cage nuts.

Anyone remember the American Bicycle Beryllium frame?

Glued together, it was.

Found this too….Bike bag

I’d not want to work on putting that thing together – Be is pretty toxic. Considerably lighter than carbon though, but I wonder if that would be offset by having to use more of it. BeAl alloy might be better – still toxic and a pain to work with though.

I had great success during the ’93 – ’94 race season when I used a sharpened teaspoon to scoop out all the meat from inside my body..

I replaced it with small polystyrene balls.. thus saving nearly six stones (about 38kg)..

This was the equivalent of 3.2 complete bicycles enabling me to ride two at once and still be much lighter than the rest of the field..

I won everything that I entered that year..

Helium would get out of the inner tube at a fair rate. Small molecules isnit.

Well it stays in party balloons long enough but you would have to keep topping it up and I doubt you would save much weight.

How many guys did you win yunki?

have you seen the price of helium? plus the logistic of getting it in there makes it a complete non-starter

lol @ yunki

I considered helium filled tyres, but instead saved a huge weight by waxing my balls. My wife likes the two little Yul Brynners too. Bonus.