7 exactly same blowouts in 7 tubes in 2 weeks

[dodgy]

Are you sure this might not be the tyre rotating freely from the rim under braking and taking the tube with it? That would cause a failure at or near the valve. Use talcum powder in the tyre so the tube doesn't get stuck to the tyre.

 

[si_c]

Which weinmann rims are you running, XR18s? If so weinmann rims are designed for 18-23c tyres, and you're running much wider, I'm wondering if that might be the cause of the problem.

I'm just speculating, but it may be that with the lower pressure you run the tyres at, they're not seating properly on the rim and moving a little as @dodgy said above, which could be causing the problem, as to my eyes that looks more like a tear than a puncture.

 

[Tim Hall]

Which weinmann rims are you running, XR18s? If so weinmann rims are designed for 18-23c tyres, and you're running much wider, I'm wondering if that might be the cause of the problem.

I'm just speculating, but it may be that with the lower pressure you run the tyres at, they're not seating properly on the rim and moving a little as @dodgy said above, which could be causing the problem, as to my eyes that looks more like a tear than a puncture.

Except he says "I rode all last summer and through the winter on this exact rim and tube and tire with no problems. "

 

[Rickshaw Phil]

I had exactly the same issue on my knockabout bike a while ago shortly after getting some new Halfords tubes:

After the third had gone the same way without being able to find a reason for it I decided I couldn't trust them any more and got a different brand. No problems since with those.

 

[Woodn88s]

Which weinmann rims are you running, XR18s? If so weinmann rims are designed for 18-23c tyres, and you're running much wider, I'm wondering if that might be the cause of the problem.

I'm just speculating, but it may be that with the lower pressure you run the tyres at, they're not seating properly on the rim and moving a little as @dodgy said above, which could be causing the problem, as to my eyes that looks more like a tear than a puncture.

it's definitely a tear and not a puncture. thanks for your reply

 

[Woodn88s]

it's definitely a tear and not a puncture. thanks for your reply

the rim is an LP 18,. yesterday I went to a different store and bought a different brand of tube. I installed it with talcum powder inflated to 70 lbs and rode hard for 20 miles, I purposely didn't avoid bumps in road as I usually do. When I got back I removed and inspected the tube. there was no loss in pressure and no evidence of pimples or a tear so I believe it was a bad batch of tubes. I will keep my eye on it .
thanks

 

[Woodn88s]

I had exactly the same issue on my knockabout bike a while ago shortly after getting some new Halfords tubes:
yesterday I went to a different store and bought a different brand of tube. I installed it with talcum powder inflated to 70 lbs and rode hard for 20 miles, I purposely didn't avoid bumps in road as I usually do. When I got back I removed and inspected the tube. there was no loss in pressure and no evidence of pimples or a tear so I believe it was a bad batch of tubes. I will keep my eye on it .
thanks

View attachment 128151

After the third had gone the same way without being able to find a reason for it I decided I couldn't trust them any more and got a different brand. No problems since with those.

wow, that's uncanny........

 

[wonderloaf]

I'd have another look at the rim tape, I bought some new Shimano wheels and was puzzled that I got a couple of punctures in more or less the same place between the rim and the tube. On looking at the rim tape it is made from quite a hard plastic with a sharp edge, and somehow it had got a small crease in it which then knifed into the tube causing the puncture. Replaced the Shimano rim tape with some rather pretty Vittoria tape (shame I haven't got transparent tyres and tubes as it's probably the best looking thing on my bike) and no problems since. So just wondering if the edge of the tape around the valve hole could be cutting into the tube?

 

[Woodn88s]

Thankyou everybody, I have lost track of the replies, if I didn't personally reply to your replies, my apologies. This is a great site, so glad I found it.
I believe I have solved this.

yesterday I went to a different store and bought a different brand of tube. I installed it with talcum powder inflated to 70 lbs and rode hard for 20 miles, I purposely didn't avoid bumps in road as I usually do thinking that my heft on the seat may be amplifying the problem. When I got back I removed and inspected the tube. there was no loss in pressure and no evidence of pimples or a tear so I believe it was a bad batch of tubes. I ordered a couple Schwalbe tubes and will steer away from the cheap stuff I will keep my eye on it .
thanks

 

[Woodn88s]

I had exactly the same issue on my knockabout bike a while ago shortly after getting some new Halfords tubes:
View attachment 128151

After the third had gone the same way without being able to find a reason for it I decided I couldn't trust them any more and got a different brand. No problems since with those.

that's amazing Phil, exactly my problem. I so appreciate you posting this, I have now visited 5 bike shops and not 1 mechanic had an answer. I do believe it was faulty tubes and have posted what I found. thanks again
Gregg

 

[byegad]

Looks like the valve isn't all the way home in the rim leaving a bubble to form either side of it. I had this on an aero rim I'd unwisely drilled out for Schrader valves. refitting Presta tubes with a suitable hole filler plug to take up the slack solved the issue.

 

[dodgy]

Thankyou everybody, I have lost track of the replies, if I didn't personally reply to your replies, my apologies. This is a great site, so glad I found it.
I believe I have solved this.

yesterday I went to a different store and bought a different brand of tube. I installed it with talcum powder inflated to 70 lbs and rode hard for 20 miles, I purposely didn't avoid bumps in road as I usually do thinking that my heft on the seat may be amplifying the problem. When I got back I removed and inspected the tube. there was no loss in pressure and no evidence of pimples or a tear so I believe it was a bad batch of tubes. I ordered a couple Schwalbe tubes and will steer away from the cheap stuff I will keep my eye on it .
thanks

I still think it's a loose fitting tyre that is turning independently of the rim, adding the talcum powder stopped the tyre from taking the tube with it.

 

[Woodn88s]

I still think it's a loose fitting tyre that is turning independently of the rim, adding the talcum powder stopped the tyre from taking the tube with it.

I agree..................
after much research I have also figured out that my tire is to wide for the rim I have. The rim will take a 18/23 tire. My tire is a 47 wide. I had a LBS order the rim to fit my tire more than a yr ago, I also found out that they ordered a rim with a presta valve hole and drilled it out for a schrader valve. Obviously I am done with this shop. I really like these tires so I ordered another in the correct width for this rim.

 

[Woodn88s]

Looks like the valve isn't all the way home in the rim leaving a bubble to form either side of it. I had this on an aero rim I'd unwisely drilled out for Schrader valves. refitting Presta tubes with a suitable hole filler plug to take up the slack solved the issue.

I just found out that when I purchased this rim from the LBS that they not only ordered a rim that was too narrow for my tire but also drilled out the presta rim hole to fit a schrader vale. Last time I use that shop. for now I plan on using this rim but I ordered the correct tire for this rim.
thanks

 

[Gravity Aided]

Glad to hear your tube problems have abated for now, but it's always worrisome when I see presta rims drilled for Schrader valves.