Join Date: Apr 2002
Location: Montréal (Québec)
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Are you sure the spring is actually broken?
Inside each post of a typical v-brake, there is a coiled spring. If you ride a lot under dirty conditions, and especially in Winter, the arm and spring assembly gets very dirty and doesn't spring back easily. The cure:
- Unhook the brake cable.
- Remove the bolt which acts as a pivot for each arm.
- Pull the arm out.
- Clean the pivot, spring and the cavity in the v-brake where the pivot sits (WD-40 does a good job).
- Grease and re-assemble.
I typically have to do that every 2 years on my single bike which travels about 8000 km per year, including lots of winter mileage.