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• #2
If the guides are larger(like the old type) you won't get the cable housing to hold still so when you pull the brake lever the housing will just go past the guide(shortening the cable run) and the brake won't do anything at the other end.
tl:dr it won't work the other way on that bike
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• #3
ok good explanation, thanks.
Just had cables fitted at the bike shop on a 1980s road frame. Brake cable runs in full housing through 3 cable guides on the top of the TT, as I think is typical for older frames. Just interested in whether it's necessary for the cable to be housed all the way. All my previous road frames have had the housing stopping at the first cable guide, then bare cable for most of the top tube, before going back into housing close to the seat tube. Usually these are under the top tube. My girlfriend's surly cross check has similar arrangement but on the top of the top tube.
Personally I think having the cable run all the way in the housing doesn't look quite as good, but maybe there's a good reason why it needs to be like that?