What's wrong with my wheel/tire?

Lucifer-0

Hi.

So yesterday I got a flat and changed the tube. After inflating it properly when I got home I noticed a bit of a bubble on the wall of the tire where the valve is. I can't get rid of it, I tried taking out the tube and inflating it again. If I pump it to 100 psi or over the bump in the tyre is severe. I let out some air and it's not too bad, but when cycling you can feel it, almost as if you're constantly going over a bump.
Please see attached photo, it's not too severe here as it's not fully inflated.
Could there be a problem with the tyre or wheel?
Thanks.

jaqian

I've had this before its either a twisted tube (had to redo it three times) or the wall in your tyre is gone. Narrow tyres/ tubes are a bitch to change.

Statler

Your tyre isn't seated properly on the rim. Riding that would be a bad idea... Riding that over 100psi is asking for a Darwin award. Deflate the tyre, and reseat it. The tyre should 'clinch' into the rim evenly all the way around, hence the term 'clincher'. Start by seating it into the rim at the valve hole and work towards opposite sides of the wheel evenly. If it's still like that then bin it. How old are the tyres anyway, wouldn't be too happy with the threads coming off them, and they look well worn on the sidewalls although the thread looks okay....

carthoris

Statler wrote: »

Your tyre isn't seated properly on the rim. Riding that would be a bad idea... Riding that over 100psi is asking for a Darwin award. Deflate the tyre, and reseat it. The tyre should 'clinch' into the rim evenly all the way around, hence the term 'clincher'. Start by seating it into the rim at the valve hole and work towards opposite sides of the wheel evenly. If it's still like that then bin it. How old are the tyres anyway, wouldn't be too happy with the threads coming off them, and they look well worn on the sidewalls although the thread looks okay....

That above is good advice. Also when you deflate the tyre remove the nut from the valve which is keeping it from being pushed back into the rim. After you have reseated the tyre, connect the pump to the valve, push the valve back into the rim and then start pumping. What can happen when you have the nut on the valve it can cause the tube to inflate, pushing the tyre off the rim and causes what you see. You should push the valve back into the rim to ensure the tube inflates in the tyre and not too close to the rim.

Before you have completely inflated the tube check to see that it is inflating properly, that the tyre is not being pushed off the rim and that there is not a bulge forming at the valve.

MediaMan

^^^
What carthoris said.

I've had this problem before and it took me several fruitless attempts and a quick google to figure it out. What happens is the reinforced part of the tube surrounding the valve gets stuck between the rim and the beads of the tyre. The result only becomes obvious when the tyre is fully inflated, and no amount of deflating and inflating will change that unless you follow the magic step.

Pushing the valve stem partway into the tyre before inflating ensures that the tube doesn't get caught between the bead and the rim and solves the problem.

Lumen

MediaMan wrote: »

Pushing the valve stem partway into the tyre before inflating ensures that the tube doesn't get caught between the bead and the rim and solves the problem.

This will happen automatically if you bin the ring screw thingy on the valve, which is mostly useless anyway.

Lucifer-0

Thanks for all the advice, I'll try that that thing with the valve tomorrow evening, cheers.

Lucifer-0

Statler wrote: »

How old are the tyres anyway

Around 8 months old. Not sure how much mileage.