So today is the first day of snow here in Norway, and I had prepared well for this day. My Giant Cyclocross has new spiked tires and i've done a check on all components, they are ready for the winter-commuting.
When I got to my first climb on my way to work today, I noticed my right shifter wasn't working. I got Shimano Sora shifters, and Tiagra derailleurs. I could flip the shifter, but the gear wouldn't stick. If I held the shifter flipped, the gear would lower, but as I released it, it would jump right back. This happened after just 5 minutes outside in the heavy snowfall. It was as if the mechanical inside the shifter wasn't working. I store my bike indoors at home, so my bike wasn't frozen when I got on, and I don't think its below 0Celcius outside even.
My bike is only a year old, and I haven't had any big troubles with either shifters or derailleurs before. This is my first year riding it in the snow.
Is this a common problem with the cheap shifters? Is there anything I can do to help/prevent sticky shifting?
edit: It seemed I could shift into a heavier gear without problem (loosening cable tention), but shifting into a lighter gear( thightening cable) was close to impossible.
Edit 2: After the whole day inside my shifter still won't work. I'll open the shifter up this weekend and see if I can find the problem.