Originally Posted by
Andrew R Stewart
The imaged guide is meant for a brake cable, in addition to the two gear ones. The third tunnel is centered between the gear guides as a under the chain stay brake has it's cable usually running to the center of the caliper/arms (as in a roller cam or u brake). Whether said guide will locate the hub brake cable's path well and not contact the tire remains to be found out.
It's not hard to come up with alternative cable routing devices. Short lengths of casings zip tied to the DT and stays is but one simple option. Andy.
Interesting. Thanks for the information. I was wondering what those types of BB cable guides were intended for. I guessed tandems, and I was partially right, as they have their own 3 path BB cable guides.
In reality, I don't need a 3 path one. I just need a two path one where both paths are pointed toward the chainstays and not toward the middle for a front derailleur mounting. I've actually found a few of those as well, so that's probably what I'll end up going with. I do like the idea of pieces of cable housing, although I'd guess that the cable would prematurely wear through the housing because of the location and odd forces on the housing. (A lot of compression between the actual cable and BB would probably cause the housing to wear unevenly. I'm only guessing though.) And I'd think that the housings down there would get very dirty, pretty quickly.
I think that both the hub brake and internal hub are meant for full length housings, but I've really just never had good luck with them, so I try to avoid very long housing runs.