I own a Nimbus Nightrider Pro 36er that I purchased in Jan of 2011 and haven’t ridden in a few months. Yesterday I went to inflate the tire and discovered it has a leak. The leak isn’t coming from the part of the tire that makes contact with the road or the sidewall. The leak is coming from the rim side of the wheel - the side where the value stem is located. The center of the rim is lined with 34 holes, each 1/2" in diameter. The leak is coming from one of these wholes.
Have any other Nightrider owners experienced a leak like this? If so, did you have to replace the tube? It seems impossible for the tube to develop a puncture in this location.
While not on a 36er I have had a leak on the rim side of the tube. I was riding xc at the time, no hops, the terrain was smooth, no foreign objects inside the tire, and no explanation. It just went flat while I was riding.
The best I could figure was that the rim strip was a bit off center and the tube could have punctured against one of the drilled out portions of the rim… even though there were no rough/sharp edges. That or it was a defective tube.
The leak was in one of the dimples which forms inside one of the many holes inside the rim. I suspect the 34 holes in the rim are to reduce weight. There’s a liner inside the rim to prevent the inner tube from bulging out the holes, but it’s not enough. The inner tube forms dimples inside each hole in the rim. The leak was at the center of one of these dimples.