Call me stupid but…

If the idea of tubeless is to remove the weight / feel of the inner tube and prevent / minimise punctures but the downside is the faff, why not, have a very thin latex tube, with a profile similar to a tyre and pre filled with some sealant (think condom like tube complete with spaff).

The pre filled Johnny tube (as it will now be called) would have a regular valve and set up would be very simple. Inflating would fill and pressurise the void in the tyre / rim without the need for all the faff and paraphernalia of tubeless and without (i assume) the weight and feel of a standard tube. Punctures if they rip both tyre and tube could still be sealed by the spaff.

(steps back and awaits ridicule)

Stupid – there I said it

Good thinking at the back….. But what happens if a thorn punctures the “Johnny” and it simply deflates…..
Where is all the remaining latex….?? IN THE JOHNNY! A tiny bit might come out the thorn hole, but you need the latex free within the tyre……

DrP

You sir, are a ‘johnny tube’.

DrP, In my simple mind, the thorn issue is no different from a normal tubeless set up. Sealant is in there and would seal the hole in the same way as a thorn through a tyre.

There are already ‘slime tubes’ and you can if you wish put Stans in your inner tube. I don’t get how you special tube would be any different.

It’s been done.

Although they werent’ johnny thin.

I’d have thought your johnny’d have to be well baggy for it not to split wide open when punctured if it was ded thin

If it was, it’d be ba bastard to install without nipping it under the bead

So get an Über light tube and deal with the extra 4 grams.

I was thinking a very thin and overly baggy tube would not pinch flat, and if it did it might seal. Getting stuck under the bead might be a problem.

Have a wazz and a dump before riding.

bigyinn – Member
Have a wazz and a dump before riding.

All well & good, not sure how that would help seal your punctures though?

I’d have thought your johnny’d have to be well baggy for it not to split wide open when punctured if it was ded thin

Doesn’t matter. Once the tyre is up, the tube is redundant.

The basic premise is flawed though.

Tubeless doesn’t need to be a faff. So do it right and get all the benefits without the faff

sounds good to me but I’m uninitiated so far, even with Arch EX. reason being, I’m worried that I can’t swap tires easily… I’m always swapping tires.

Johnny Panic – Member
bigyinn – Member
Have a wazz and a dump before riding.

All well & good, not sure how that would help seal your punctures though?
Depends on where?
And it is easier to swap tyres, no tubes to worth about 🙂

Doesn’t matter. Once the tyre is up, the tube is redundant.

the only attraction I can see of this is that it’s less messy/wateful when you take a tyre off. you’d lose that if the johnny’s potentially split and there’s jizz everywhwere just like normal tubeless

Also cost – reusing them would clearly work out cheaper

Molgrips has got it. The Johnny is a vehicle for getting and keeping the jizz in without the mess and if it doesn’t split no mess on taking the tyre off / reusable.

The less faff stems from the Johnny converting any rim tyre combo to tubeless ready – you would not need tubeless ready rims or a special strip. It would also minimise all the other potential leek points on a tubeless set up i.e. through the tyre wall or the seal between rim and bead. It would also inflate without any problems first time with any pump.

Even latex tubes pinch flat though + you’ll have added rolling resistance from the tube (not that it really matters). Latex tubes also leak a lof of air so presumably a lot of the sealant is going to leak from your ultra-light ones and harden between tube and tyre? Not a wholly bad idea but as I’ve not yet had problems fitting tubeless tyres and rarely change them I don’t think I’d bother even if it was a product on the market.