Serious Puncture Problem

[Alex-Mitchinson]

I have had 4 punctures within the last 2 days, they have all been on the inner part of the inner tube and quite near each other, very small holes and therefore slow punctures. Would probably not put this down to bad luck or karma.

Have cleaned inside of rim, rim tape, tube (inc new tube), and tyre.

Any suggestions please?

Alex.

Edited April 3, 2007 by alexmitcho

[Danny Kearns]

That is called a "Rim Pinch" Some call it "Pinch Flat". It is where the tyre and the tube pinch together on the corner of something.

The only reason i can think it happening so often is that:

A - You are running your tyres to soft and landing to heavy.

B - Your using rubbish inner tubes/Tyres.

Dan.............

[Lawnmowerman]

Check the bead of your tyre, if it's a wire one they can poke out a bit sometimes.

[ruption0]

there maybe a few brass filings from the spokes still inside of rim and tape that maybe be causing it

[Ash-Kennard]

i imagine it is just long spokes poking the tube

[squince]

i imagine it is just long spokes poking the tube

Causing a slow puncture?

[Ash-Kennard]

well yeah, if he tensions his wheel alot then it could, done it to me before. pissed me off a treat until i worked out why

[Token]

Its undoubtedly a pinch a flat he's getting if there are two very small holes very close together. Imagine landing on a corner of a object hard, there is little air pressure, the tyre is squashing the inner tube against the walls on the rim and 'pinching' them. That's why he's getting two small holes because it's happening on both sides of the walls on the rim.

Can only suggest getting a better tyre with thicker sidewall or, this is my option, I just bought a kenda rear bmx tube that is 2.25mm thick. It weighs abit more but I dont have to keep repairing it, and I can run ludicrously low pressures. Oh and its cheaper.

[eskimo]

Put some more rim tape over the original rim tape. See how it goes then.

[Alex-Mitchinson]

Its undoubtedly a pinch a flat he's getting if there are two very small holes very close together. Imagine landing on a corner of a object hard, there is little air pressure, the tyre is squashing the inner tube against the walls on the rim and 'pinching' them. That's why he's getting two small holes because it's happening on both sides of the walls on the rim.

Can only suggest getting a better tyre with thicker sidewall or, this is my option, I just bought a kenda rear bmx tube that is 2.25mm thick. It weighs abit more but I dont have to keep repairing it, and I can run ludicrously low pressures. Oh and its cheaper.

I think thats what it is, have been running lower pressures recently.

Yeh i might give that a go, where did you get that tube from?

Cheers for the reply

Put some more rim tape over the original rim tape. See how it goes then.

Already got electrical tape and the rubber tape which comes standard, but i suppose another layer of tape wouldn't hurt.

Cheers.

Edited April 3, 2007 by alexmitcho

[poopipe]

fill the tyre with talcum powder as well

[Jsy Ben]

not fill, put a little.

[scousertrials]

I call pinch flats Snake bites

[planet x alan]

i heard from someone that if you put talcom (SP) powder on your tube it doesnt pinch as easy... never tried it because i dont get 'em that often anymore. should give it a try

[eskimo]

I call pinch flats Snake bites

There is a difference. But both equally frustrating.

[edit] i should really explain. you can't get a snake bite (2 wholes) from a tyre fold puncture. therefore a pinch.

Edited April 4, 2007 by eskimo

[Token]

I think thats what it is, have been running lower pressures recently.

Yeh i might give that a go, where did you get that tube from?

Got the tube from a local bike shop, made by Kenda if thats any help to you.

[joe b]

If you grind your rim, it could be that there are still metal shards inside your rim and they could be sticking into the tube, causing a puncture. Just an idea?

Cheers,

Joe.

[Broomer]

now my tyres getting on a bit, small cracks appearing around the tread etc, i found that ive been getting punctures more often espically pinch's

[Adam-Griffin]

put masking tape all rpound the rim apart from the holes(if its drilled) and then some rim tape also if it is drilled the it could be the edges of the holes that are doing this i had the same problem a few months back and did this and it was fine !

Adam