panzer123

HI!
I am new to the forums and need help with my tyre,
It runs out of air every day even though the valve and the tube are in good condition.
I got the cycle hardly 2 months ago and everything is perfect except for the tyre.
I did the water test for both valve and the tube but not a single bubble.
I am changing my tube today because my tube burst when it probably touched 47 psi (Max is 45 Psi).
I wanted to know what the culprit is so that it doesnt affect my new tube.
Please Reply Fast

CHEERS!

SkyDog75

Bike tubes & tires are pretty thin, so it's normal to lose some pressure from day to day as air diffuses through the rubber of the tube. While you should check the pressure on your tires often, you shouldn't have a daily flat, though, if your tubes "are in good condition". Air is/was getting out somewhere, so something wasn't right.

Where did your old tube burst? Was it along the outside? Check the inside of the tire for small punctures. Rubbing a cotton ball on the inside of the tire can help you spot small sharps that might escape your eyes and fingers. Was the hole on the inside? Check your rim tape or rim strip to make sure that your spoke holes or nipples aren't exposed, which can puncture the tube. Was the hole on the side? Be careful when installing your tire that you don't get the tube pinched between the bead of the tire and the rim.

cny-bikeman

If the tube did burst (blowout) it is NOT due to any problem with the tube, as the tire first has to allow the tube to escape. The primary cause of a blowout is poor mounting technique, followed by a defect or damage in the bead or casing. Otherwise Skydog's recommendations are correct.

spdracr39

How much pressure are you putting in the tube to check for leaks? You don't want a lot but you need more than a little maybe 10 psi. If you aired the tube up to 47 psi outside of the tire I'm not suprised it burst.