On Monday, April 3, 2017 at 5:49:53 PM UTC-7, wrote:
In the flatlands we never worry about this stuff but still seems unreal you could blow a tire by overheating the rims.

How long does the descent need to be and braking? I have taken a mile 5-9% grade down and had to brake in places but does it mean you simply ride the brake continuously to get too much heat.

Have any here had this happen due to heat not poor install or other tire blows.

Deacon Mark

We have a lot of hills in the San Francisco bay area and I can't remember ever getting a flat from riding the brakes including one mile long 18% grade so I think that your blowout was a fluke from either a pinch during installation which made a weak spot in the tube or a manufacturing error. I have found these in the cheap tubes from Performance Bicycle. You can inflate the tire and a half hour later you can have it explode. Or you can come out the next day for a ride and the tire will be flat.

Continental tubes don't do this but they are expensive.