Is the rim hole too big? Maybe it’s a Schrader sized hole when you need a Presta sized one.
qx87 on
for me it was not enough pressure
I_Piccini on
Why you use so long valves? Do you have a deep section rim? If not, try getting shorter valves. You’re probably damaging the rubber on that area when you are pumping your tube, as the long valve wiggles a lot.
Nimrod-2 on
For me it was lower pressure
foobar93 on
Does it happen randomly or for example when you increase pressure? Maybe you over tighten the nut holding the valve in place and then it may rip out like we see here. Happened to me as a child for my first tube swap.
luzan8 on
The tube slips on the rim tape and rips off the valve. I had the same issue due to low pressure in the tube and old plastic rim tape which becomes stiffer with time. If you love low pressure tubes use a cotton rim tape.
Admirable_Ad_5291 on
Is your bike a Trek? The likely culprit.
Aggressive_Ad_5454 on
When you mount the tire, put the logo right by valve stem hole in the rim. Does the tire shift on the rim while you’re riding? Is does the logo move away from the valve stem hole? ( seems likely).
Put a bit of talcum powder in the tire so the tube can slip around inside it a bit even when it’s pumped up. That should reduce the problem of the valve getting yanked off the tube by something sticking between tube and tire.
9 Comments
Is the rim hole too big? Maybe it’s a Schrader sized hole when you need a Presta sized one.
for me it was not enough pressure
Why you use so long valves? Do you have a deep section rim? If not, try getting shorter valves. You’re probably damaging the rubber on that area when you are pumping your tube, as the long valve wiggles a lot.
For me it was lower pressure
Does it happen randomly or for example when you increase pressure? Maybe you over tighten the nut holding the valve in place and then it may rip out like we see here. Happened to me as a child for my first tube swap.
The tube slips on the rim tape and rips off the valve. I had the same issue due to low pressure in the tube and old plastic rim tape which becomes stiffer with time. If you love low pressure tubes use a cotton rim tape.
Is your bike a Trek? The likely culprit.
When you mount the tire, put the logo right by valve stem hole in the rim. Does the tire shift on the rim while you’re riding? Is does the logo move away from the valve stem hole? ( seems likely).
Put a bit of talcum powder in the tire so the tube can slip around inside it a bit even when it’s pumped up. That should reduce the problem of the valve getting yanked off the tube by something sticking between tube and tire.
The pressure markings on tires aren’t great. Use something like this to work out the pressure you should use. https://silca.cc/pages/pro-tire-pressure-calculator
Be really careful with power compressors not to go too too far over pressure before letting some air out.
Cheap tubes, possibly?