Tube normal?

I have a wr450 but this is for my TTR 125. I hope you don't mind me posting in this forum.

My wife's tire went flat on a ride yesterday and took out the tube. The hole was on the backside air stem on the hump..

Is that hump normal for MX tubes? The pic makes it not so bad, but when it's pumped up full its really bad.

ImageUploadedByThumper Talk1378074260.358134.jpg

I have a wr450 but this is for my TTR 125. I hope you don't mind me posting in this forum.

My wife's tire went flat on a ride yesterday and took out the tube. The hole was on the backside air stem on the hump..

Is that hump normal for MX tubes? The pic makes it not so bad, but when it's pumped up full its really bad.

attachicon.gifImageUploadedByThumper Talk1378074260.358134.jpg

 

Its just cause of the thicker rubber where the valve stem goes. Remember that it will pressurize against the inside of the tire when inflated.

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