After writing that last piece on the various ways to tension cables after they stretch, I noticed something peculiar. Everyone knows that disc brakes are coming to road, right? And when I say road, I mean drop bar bikes with integrated shift/brake levers. And lumped in "road" are cyclocross bikes which will be, by far, the bulk of road looking bikes with disc brakes. Okay, to summarize, a lot of bikes will be on the market that combine road shift/brake levers and disc brakes. Road levers do not have any method to tension cables. That's the duty of the brake caliper on road bikes. "So what," you say. So, if there are new disc brake calipers coming from SRAM/Avid and Shimano that are designed to be used with road levers and SRAM and Shimano know that their levers have no means of tensioning cables, why did SRAM/Avid and Shimano forgo barrel adjusters on their disc brake calipers? Good question and one that would have seemed easy to address by adding a barrel adjuster to the caliper. I think this point is a fail on both SRAM/Avid and Shimano's parts. Heck, Hayes was able to get a barrel adjuster on their CX5 caliper.
Avid's BB7 Road SL caliper. Nope, no barrel adjuster.
Shimano's CX-75 road caliper. Like Avid, no barrel adjuster.
Hayes' CX-5 road caliper. They got it right with that barrel adjuster there. Nice touch, Hayes!
(What's playing: Elvis Costello Chemistry Class)