[spdfrk]

You might be able to free up your brake with some liquid wrench or atf mixed with diesel fuel conditioner.

I ride in the winter and here's the setup I've found that works best for me:
- carbon mtb frame off ebay from carbonrev
- 26" magnesium cast wheels from aliexpress on the cheap -no spokes to rust
- schwalbe ice spyker pro tires
- jagwire cables coated in Teflon
- coat the cables with atf or ws2 with isopropyl brushed on
- don't bring the bike in and out of the cold - leave it in the cold
- chains, bottom brackets and cassettes can be cheap on wiggle.com on sale
- deer hide mitts for the hands
- full winter boots with liners save the toes
- full parka and toque and scarf
- replaced the grease in the wheel bearings, bottom bracket, and free hub with ws2 and nmf

Buy the winter tires in summer 1/2 price from wiggle....