FeelGoodHit

So I replaced my inner tube today and pumped my tyre to 120 PSI which is the absolute limit for my tyres. I then rode it for 30 seconds, and got a very quick flat. I took the tube out and discovered just one puncture

Just simply wondering if the PSI caused this?

Bill Kapaun

If you have a bad rim tape or similar "fault", a bit "more" might make the difference.
There IS an underlying problem though.
120 PSI is my "standard" rear pressure on one bike and no problems.

A "different" pressure might act "differently" with regard to outside sources such as thorns, sharp pebbles etc.

FeelGoodHit

So what do you advise me to do please

10 Wheels

You most likely pinched the tube when installing it, or got the tube pinched somewhere under the tire bead.

We all have done the same.

I know riders that use 145 PSI in their tires/tubes.

TheLibrarian

Make sure there's no spoke sticking out and run your fingers inside the tire for any sharp objects, try to line up the puncture with where it is on the tire by lining up the valve stem to the valve hole and inspect that area more closely in and out of the tire. Try it again fully maxed or dont max it out.

FeelGoodHit

But after I installed I went on a 10 mile bike ride and everything was fine. It wasn't only until the next day That I took the bike out for a ride and after 30s it experienced a puncture?

FeelGoodHit

No sharp objects what so ever.. My tyre are picture protection. I have know kept it at 100 PSI with a new tube and a couple KMs and no problem. I just want to get to the root of my previous problem to prevent it rather than curing the problem if it happens again

10 Wheels

Take your time when installing tires/tubes.
Pump to about 30 PSI.

Hold the axles in your hands and spin the wheel looking for any Do Whaps .

If it is uneven on one area of the rim, you have the tube pinched under the tire bead.

tarwheel 

Flats happen. Could be just bad luck, or installation error, or debris lodged in your tire tread. I have gotten flats on the first ride after installing brand new tires and tubes, and then gone many months without another one. However, most of the time when I get another flat soon after fixing one, it is due to a small piece of wire, glass or other object imbedded in the tread.

10 Wheels

You first post you said in 30 seconds it went flat?

2manybikes

The PSI alone will not cause a puncture. A puncture will usually be a small hole in the tire and tube. What did the hole in the tire look like? Did you check carefully for something still in the tire? Did you find a hole in the tire with nothing in the hole? Many small things will puncture the tube and fall out of the tire, it's not unusual.

Did the tube have a long rip in it?

FeelGoodHit

Ok let me clarify

I changed my tubes yday and got it to 110 PSI. I went on a 10 mile bike ride and everything was fine. No punctures what so ever. Today I woke up and topped my tires to 120 PSi, went out and within 30s, I got a flat. I took the tube out and small hole with no sharp objects Whatsoever. I, myself am confused as to how this **** happened. I'm a newbie by the way

FeelGoodHit

A really small rip but the tyres quickly deflated

gregf83 

Could just be a coincidence. Punctures happen regardless of tire pressure. Sometimes you'll get a fine piece of wire stuck in the tire that is difficult to see. If there is anything left in the tire you'll know soon enough.

How are you mounting the tires? Hands only? Or are you using levers to get the tire back on the rim. With levers it's not uncommon to damage the tube if it gets caught between the lever and rim.

trailangel

You get Flats when they happen. You are kidding yourself otherwise.

2manybikes

If it is not a pinhole, and a short rip in the tube, it normally means part of the tube was caught between the edge of the tire bead, and the shelf in the wheel that it is supposed to touch. It's not unusual if the installer does not go all the way around the tire with say 40 psi in it and examine the line on the tire near the wheel to see if there is a raised section where the line moves away from the wheel, indicating a place where the tube is caught. To prevent this, after getting the tire back on the rim, go all the way around both sides and look down into the wheel by pushing the tire over just a little there should be no tube visible.

Bill Kapaun

WHAT part of the tube has the hole?
Rim side or tire side?

Some years ago, I had a problem with flats occurring out of "nowhere".
It turned out my rim tape wasn't covering one of the spoke holes quite enough and would "creep" under higher pressure.
It might take 2-5 days before the tube had extruded itself far enough into the spoke hole to get the pinhole.

Is your rim single or double wall?

fietsbob

Something you left in, piercing the tire casing, was still there when you put a New Tube In (?)

cyccommute 

Flats are random. Completely random. You can pressurize your tires to any pressure you like and you'll still get flats at a completely random interval.

Not knowing what caused the puncture is also common. Many times a piece of glass or a thorn or any other kind of object will poke through the tire, puncture the tube and then get knocked out when the wheel turns.

I've had instances where I fixed a flat that was caused by an unknown object then ridden down the road 100 yards and hit a rock that caused a puncture in the same tire. You just fix it and continue on.

Where was this small rip located on the tube? If it was on the outer part of the tube towards the tire, then it was caused by road debris. But if it was on the inner surface of the tube towards the rim strip, you may have pushed the rim strip down enough for the tube to expand into the rim with the extra pressure. This is much more likely if the rim strip is a rubber or even a plastic one. I prefer Velox or cloth tape since they hold the pressure better.

Miele Man

Your original post:

"So I replaced my inner tube today and pumped my tyre to 120 PSI which is the absolute limit for my tyres. I then rode it for 30 seconds, and got a very quick flat. I took the tube out and discovered just one puncture"

So, according to that you replaced the tube and rode it the same day and punctured after only 30 seconds of riding. no mention of a previous ride that day. Are you trolling?

If you're not trolling; did the tire go flat with a bang or did it go flat with a hiss?

A smooth round hole is indicative of a puncture. That could be something thin and sharp going through the tire into the tube or it could be something sharp on the inside of the rim. A jagged edge on the hole (ie a star shape or * shape) and a bang are indicative of a pinched tube. That usually means the tube was pinched under the tire bead.

Cheers

Wanderer

Could be a shard of metal UNDER the rim strip. Check closely, and file or hone it down. Might be on the rim in other places too - look very closely.

habilis

Punctures from nails, thorns, wires,etc. are usually so small that the tire must be partially inflated and held under water to find the hole. Since you say it was a "small rip," that suggests a pinch flat. In addition to putting a small amount of air in the tube before installing it in the tire, it helps to dust the tube with talcum or baby powder. This helps the tube to move freely inside the tire during final inflation, avoiding pinches and creases.

Miele Man

Just notice there're two threads started a few minutes apart dealing with this flatting.

High air pressure inside the tube won't cause a punture unless a, something else penetrates the tire or b, the tube gets pinched somwhere and 'pops' a hole.

Tires on the velodrome are often a lot higher than 120 psi.

Cheers