Help! Any ideas what keeps causing this puncture?
I had this problem a few years back, sometimes only got a mile down the road and it would happen, I think the comment above might be right, put a mark on the tyre and rim and see if the tyre is slipping on the rim.Posted 4 years ago
I think I ended up getting a new set of tyres, sorry can’t be more helpful.nickjbSubscriber
Tyre moving on the rim for sure. Used to get this loads with old skin wall tyres. The only fix that worked was a couple of drops of super glue on the bead. It didn’t need much and only on one side so you could still fix a normal puncture. Not had it for years, though.Posted 4 years agoCraigWMember
Are you using presta valves on a rim that’s drilled for schraeders? Try threading the nut down to the base of the valve before inserting the inner tube – it’ll stop it pushing into the hole and pinching the rubber.
Or you can get a proper adapter to fit in the hole. eg something like this: http://www.ukbikestore.co.uk/product/91/wm0173/wheels-manufacturing-schreader-presta-rim-hole-adapter.htmlPosted 4 years agoDarrenHSubscriber
This – [img]http://farm8.staticflickr.com/7288/9195812348_211cbf0a18_z.jpg[/img][/url]Posted 4 years ago
Comeback ride 🙂 by DarrenH29, on Flickr[/img]
Must of had about 10 in the last few months, more in the front wheel than back.
It’s always the same split at the base of the valve and it’s happened to 3 different makes of tube.
I’ve got Halo freedom 29er rims and have checked the inside of the valve hole for burrs etc and both are okay, i’ve even tried putting a patch of old inner tube over the valve before I poke it through the rim to act as an extra layer but these never show any signs of rubbing as the splits always seem to start inside to tube.
Am I running my tyres at too low pressure? (the gauge is broken on my track pump so I only run them at usual quite squidgy pressure) however I have tried higher pressure but the splits still appear.
Am I tightening the valve to the rim too much? or too little? so the base of the valve is too free to move around?
Sorry for all the questions but I’m running out of ideas.
Help please stw collective!
I wouldn’t recommend that particular adaptor unless you’re happy to replace it with it with each new tube you buy. I had a set and they’ve corroded onto the valves v. fast. if valve hole and valve are different, get new tubes. schwalbe, for one, cater for every combination.Posted 4 years agohs125Member
I’ve had this at various times on different bikes. I’m sure it is caused by the tyre rotating on the rim. Tyres that go on and off easily without levers are worse than others. Higher pressures definitely help, and pumping newly changed tyres up to their maximum PSI for a day to firmly seat them also seems to help.Posted 4 years ago
I’ve never got a pinch flat (no rocks around here), but am seriously considering tubeless for this reason. Having to throw away tubes without a single patch on them seems such a waste.zilog6128Subscriber
Had something similar years ago when using a crappy old-school pump that screwed onto the valve. There was something wrong with the pump and it would twist the valve/tube weakening that area which would result in a split there later on. Only figured this out many unrepairable tubes later!Posted 4 years ago
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