Question for the Klein people. looking at a used Quantum on CL and when I test rode it there was some clanging noise on top tube when ever I hit rough road. Sounds like the integrated brake cable clanging on the top tube. Is that normal for the klein to make noise due to this integrated cable? Or do you think there is something else inside the top tube making the noise. I absolutely loved the ride of the Klein but I can't have a bike that makes noise. THanks.