tag:blogger.com,1999:blog-8908461644259659419.post969173056398769678..comments2024-03-27T19:12:49.609-07:00Comments on Midlife Cycling: Disc Brake Failures, Now And ThenJustine Valinottihttp://www.blogger.com/profile/10852069587181432102noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-8908461644259659419.post-73311040395109177732015-09-16T18:36:31.136-07:002015-09-16T18:36:31.136-07:00Brooks--I should be getting my BQ soon, so I'l...Brooks--I should be getting my BQ soon, so I'll read that road test. Thanks for the heads-up!<br /><br />In all of the riding--including steep mountain descents--I've done with caliper brake, I never lost braking power because of overheating. Once I got a flat because, apparently, the heat on the rim over-expanded the tube. (I couldn't find any debris or any other probable cause.) When I took off the tire, the rim was hot to the touch.) That was on a long descent in Switzerland, just after I crossed the border from France. I never had any problems with my brakes during that ride.Justine Valinottihttps://www.blogger.com/profile/10852069587181432102noreply@blogger.comtag:blogger.com,1999:blog-8908461644259659419.post-41423370144818214722015-09-16T16:55:06.864-07:002015-09-16T16:55:06.864-07:00You know, I just read in the latest issue of Bicyc...You know, I just read in the latest issue of Bicycle Quarterly, which arrived yesterday, a road test of the new Specialized Diverge - a carbon fiber adventure bike, equipped with shimano's road disc brakes, and while the brakes didn't fail on a mountain descent, they did behave badly enough that it just reinforces my skepticism of the things. Overheating became an issue, and it sounded as though the front rotor warped. As the brakes heated up on long descents, the brake lever would bottom out on the handlebar. Meanwhile, Jan Heine's riding companion, on a bike with center pull rim brakes, found that his brakes, and the rims, weren't even hot - and his braking remained consistent and predictable throughout the entire ride.Brookshttps://www.blogger.com/profile/12110998345857993287noreply@blogger.com