Ok, that was alarming!

[Saluki]

@vickster Were the tyres still up this morning? Was it the bead?

 

[Pale Rider]

According to Schwalbe, tyre slip is more of a problem with lower pressure mountain bike tyres.

Quoting from their tech document: "Theoretically, the use of talcum powder is also helpful.
"This can reduce the friction between tire and tube so that the tire no longer moves the tube along with it.
"However in practice, if talcum powder gets between tire and rim, it will increase the problem."

That's from page 25, but the rest of it is worth a read as well.

http://www.schwalbe.co.uk/_webedit/uploaded-files/All Files/Technical Info.pdf

 

[vickster]

@vickster Were the tyres still up this morning? Was it the bead?

Must have been as there was still air. I'll check the pressure later

 

[dan_bo]

We need a mythbuster challenge. I get the feeling that even if you lube up the beading like nobody's business, it'll still take a massive force to get the tyre to slip when inflated. Could be wrong of course so I suggest @dan_bo spreads butter on his beading and then goes for it down Holme Moss in the name of science

Wessenden head is where you wanna be trying such shennanigans. Arrow straight, Mile and a half long and about 9%. WIth a busy T junction at the bottom. Speaking of bottoms I did have a blow out trying to stop at said T junction but it was knob all to do with relative tyre rotation.

 

[dan_bo]

According to Schwalbe, tyre slip is more of a problem with lower pressure mountain bike tyres.

Quoting from their tech document: "Theoretically, the use of talcum powder is also helpful.
"This can reduce the friction between tire and tube so that the tire no longer moves the tube along with it.
"However in practice, if talcum powder gets between tire and rim, it will increase the problem."

That's from page 25, but the rest of it is worth a read as well.

http://www.schwalbe.co.uk/_webedit/uploaded-files/All Files/Technical Info.pdf

29er Tyres on a 26" bead will do that.

 

[John the Canuck]

I'll use talc, well baby powder, next time. Thumbs still sore!!

i start opposite the valve ie finish at the valve
then giving the valve a wee push inwards to ensure the adjacent tubing is not trapped

make sure the 2 beads are well down in the well [groan] and it will help getting the last few inches over the rim

 

[Globalti]

A bit of talc is probably OK, but I'm wary of lubricating tyre beads.

What you don't want is to pull on the anchors, the wheel stops but the tyre keeps going.

Which is why specialist bead lubricants are designed to lube for a minute or so and then evaporate, leaving plenty of friction between wheel and tyre.

Sorry fella but that's the most ridiculous suggestion I've ever seen! When I started mountain biking and was very inexperienced I had an idea you should run tyres at something like 15 lbs and yes, when I braked they used to creep around the rim and tear the valve out. But at 100 psi? Na way-o!

 

[ColinJ]

I had a MTB tyre slip round and rip a valve out once, but I did only have about 35 PSI in the tyre at the time.

I was lucky in two respects ...

1. It didn't happen on a nasty road descent when I braked into a tight bend from warp speed - here.
2. When it happened on the flat road below, a driver coming the other way reacted very quickly when I suddenly veered across the road and fell in his path!

I have experienced that popping sound on my Cannondale recently when inflating my new latex tubes. I think the sound is the actual tube slipping inside the tyre, not the bead of the tyre itself. I have started using talc on the tubes to minimise it.

 

[Joey Shabadoo]

Swapped some tyres onto different wheels tonight (yes, I did this myself!!). Fairly straight forward apart from the usual cussing to get on and off the rims and sore thumbs Anyhow, pumped up to 100psi, bike sitting there, I watching TV and there's an alarming pop, similar to removing the track pump from the valve but louder. I assumed I had cocked up somewhere and split a tube! Very odd indeed however as the tyres seem to be holding air, or had done for an hour or so...

Most weird, will I find flats in the morning!?

Did you check behind the washing machine for exploded hamsters? That's usually the cause in my experience.

 

[vickster]

I have a murderous cat - more likely a mouse

 

[Joey Shabadoo]

Mice go "squeak-pop"

 

[vickster]

Oh bugger - this evening's trick, an exploding tube while pumping it up after fitting to the rim, it all seemed to be going so smoothly, easy to get the tyre on. Big bang luckily not too close to my face and a big split by the valve. B*ll*cks

 

[summerdays]

Probably the best smelling too!

Mines Laura Ashley so very perfumed!