Rear tire gone bad??
 

I've had Michelin Krylions mounted on PSIMETs for over 1 year now. Not a single flat until now.

Now, I can't keep air in the rear and I've replaced the tube 3X times with the same result. At night, tire inflated. In the morning, tire completely deflated.

The Velox rimtape appears to be in good shape, as does the rims and interior of tire.

Suggestions/possible solutions?

Where is the leak on the tube?

Yes, remove the tube and inflate it to see where the leak is. That might help figure out the problem. If it's in the outer surface of the tube, there must be something in the tire causing the problem. If it's a "snakebite" type puncture, maybe you're being too rough when installing it. :)

First rule of fixing flats: determine what caused the flat.

Puncture on outside of tube - tire problem.
Puncture on inside of tube - rim problem.
"Slit" in tube - bead failure

you might have a 'Michelin wire' somewhere in the tyre. along with identifying where the hole is in the tube... turn the tyre inside out and feel along the surface for irregularities...

+1. Every single time you replace a tube, figure out where the hole is in the old tube and make sure there is no continuing problem at that location.

Run a ball of cotton around the inside of the tire. It may snag on whatever's causing the flat. Or, as suggested, you are pinching it during installation.

Or your un-gloved finger (if you are on the road.)

Thank you all for your kind suggestions.

Tonight, I put 3 tubes in the dunk tank. All 3 had a pin prick leak on the INSIDE of the tube.

The Velox visually appears to be in good condition. No spokes are sticking through. I've run both a cloth & bare finger around the rim several times and no sharp points are apparent.

Thoughts?

Are the holes all in the same place (relative to the stem)?

Yes, same relative position on the tubes.

At that position on the rim, there is no obvious reason (at least to me :)) for causing a pin prick sized hole in the tube.

One thing that helps with this is to install the tire so the label is aligned with the valve hole in the rim. Then when you find the puncture in the tube, you'll know where to look on the tire.

Rim tape is very inexpensive. If your holes are on the inside of the tube just replace that rim tape. It doesn't take hardly any exposed nipple bed to cause this type of puncture. I had the same problem some years ago. Really irritating.

ahsposo, that sounds like a good next step.

I thought the first rule of flats is you don't talk about flats.

You don't brag about not getting flats. If you're getting eaten up by them it doesn't matter.



When I saw the title to this thread this announcer voice went off in my head, "When Good tires go Bad..."