The beads of non tubeless tires cannot withstand the high pressure involved with road tires. It would be incredibly dangerous to attempt using a non tubeless road tire tubeless. There's lots of information on the web about this.

But if you cam just. ammuse me a little... what IS the difference between tubeless tyres and non ? Is the bead different?

Carbon fiber bead rather than kevlar, and a layer to retain air. Maybe more. The very strong and stiff bead is needed to keep the tire from blowing off.

You'll find that tubeless tires make a bit less sense on a road bike than they do offroad.

I get your point that the pressures are high - but they're equally high with a tube and tubeless !
With nice soft very elastic latex tubes, does this really make the difference between popping off and not ?
Is the concern the tyre 'burping' ? (Which at least on mtbs is a low pressure issue) or the bead blowing off the rim ?
And hookless rims - no backup hook there when run with a tube.

I like to know the logic / mechanism / why, as well as the 'what' ! From some searches i get the 'don't do it' loud and clear bur little on the 'why not' (beyond 'it's dangerous' )- why is it dangerous ?

Thanks
Bob.

Hi all

I'm about to take delivery of a new road bike (😁) and as with many these days comes with 'tubeless ready' wheels, but not set up tubeless and comes with tyres that are not tubeless-specific.

I'm familiar with tubeless having used it for many years mountain biking. In MTB circles it is common practice to use normal non-tubeless tyres (eg not UST) set up tubeless. I've done that for years myself.
Depending on the tyre and rim, some air up more easily than others, and some weep some sealant more in the sidewalls until the sealant... seals.
But never had any problems with tyres coming off etc..neither have any mtb friends.

Onto road bike. I've not tried to use non-tubeless road tyres as tubeless.
But obvs the new bike brings brand new tyres that I'd prefer not to toss onto an ever increasing pile of unused and part worn spare tyres !
Anyone got any experience?

I realise the pressure is far higher, and volume much lower etc if there's a problem. And speeds typically higher (= more consequences on failure - usually).

Is there anything special re tubeless road tyres beyond better-coated sidewalls ? Eg do they have closer tolerances on the bead etc ?