I've been using doubled up tyres on the back wheel of my winter bike for a while now- I always have the most worn tyre on the back, but sadly Gatorskins aren't so p******e proof when they wear thin. So I pop a worn out race tyre inside (a GP 4000 with the bead cut off) to stop the P******es happening. And it works!

Last Sunday I was wondering why there was a repetitive bumping feeling, discovered this when I got home...

what the hell is p******e?

Puncture

You can't say puncture here?!

Edit: Apparently you can.

You shouldn't say that word. Don't jinx yourself.

I've never thought to double up on tires before. Of course, I've never thought to cut off the bead, either. It certainly works, though.

Doubling up tires isn't really going to do anything. You wear through the tread and into the casing. The casing is what keeps the tire together. The second layer of rubber underneath is not going to stop the casing from blowing apart like what happened in the above picture.

Sure, but he rode home without losing air pressure.

...so you missed the part where he got to ride home and not walk it? you're right. doubling up tires didn't do anything for him.

Another way to achieve the same result would be to toss worn tires and replace with fresh ones.

lulz.

Funny this should come up...when I started riding in the '70s, there were only a few adult cyclists in the San Francisco Bay Area. One of them was an Italian-born guy about my dad's age who lived a couple of miles from me, and I used to see him occasionally on the climb over the Peninsula. One time I had a flat going up, and he mentioned this same trick. I didn't try it and hadn't thought of it in years, but it's sort of a poor man's Mr. Tuffy.

so... what do you do here?

cut off the bead on the inner tire?
just loosely mount the outer tire on the mounted tire?

is this like double layering your condoms?

I like to cut the beads off 4 tires, then epoxy them together in a super sandwich, I then stuff that whole mess under a mounted tire. It was a trick I learned form my third uncle who saw a European monk do it to a leprechaun's bike.

Better alternative: tire liners. Why waste time cutting up old tires?

More time than money.

it's really easy cutting up kevlar bead tires. wouldn't take more than 10mins per tire.

It's the other way around -- cut off the bead of the old tire and mount it inside, between the tube and mounted tire.

So, yes, like a tire liner, but more substantial, already tire-shaped, and seamless.

This seems like a bad idea. The friction between the two layers of tires could cause unusual problems. I wouldn't trust a tire setup like that at speed.

I worked with tire liners when I worked at a bike shop. Unless you glued them to the inside of the tire, they shifted and either allowed punctures or they shifted and pinched the tube between them and the tire, causing a pinch flat.

Slime was just as much of a joke.

Damn! Dude, where are you riding? Minefields?

where do you think they got the idea for tire liners?

im curious what a tyre is

well, if you pick up a dictionary...

good that it worked for you.

...it just seems like a bad idea for ride quality and cornering grip. then again, who knows if you care about either.

I think his focus is more on survivability and get-home-ability than speed & grip.