Tyre Slip

[Nardies]

Just had a silly, but painful off. I've been running slicks on my MTB for a while, but have recently resorted to adding a bit of off-roading to my regular route. Popped my Schwalbe Nobby Nics back on today and went out for a blast, was on a downhill section of tarmac, felt some vibration and noticed the front tyre bulging before it burst and launched me off the bike.

After licking my wounds, most annoying of which was the brand new base layer which was ripped to shreds, I stuck a new tube in and limped home. It started doing it again, on one side the tyre was slipping off the rim, on the section next to the valve. This is probably what happened in the first place but I was going too fast to do anything about it. What's going on here, poor tyre fit, or do I need rim tape or something?

[ewenm]

Sounds like you haven't bedded the bead of the tyre into the rim properly.

[anonymous-user]

if the tyre is going to be hard ot fit anywhere, its around by the valve. at a guess there might be too much pressure in the tube when you are fitting the tyre and its not sitting snug under the lip. you may have a poor tyre bead but its very rare.

[Nardies]

I make a habit of putting a bit of pressure on the bead, near the valve before I pump it up. I'll keep an eye on it in the future.

[Furberger]

Try pushing the valve in a bit when you seat the tyre. The thicker rubber where the metal of the valve attaches to the rubber of the tube can stop the tyre seating correctly if it gets between the bead and the rim, but this is only normally a problem on a narrow rim with a small tyre.

[alfa pint]

Furberger said:

Try pushing the valve in a bit when you seat the tyre. The thicker rubber where the metal of the valve attaches to the rubber of the tube can stop the tyre seating correctly if it gets between the bead and the rim, but this is only normally a problem on a narrow rim with a small tyre.

^^^ This. I have this problem all the time on my road bike.