I've been on the nexus 7 speeds from shimano for the last 2 years up to -35C plus windchill for 5 hours. I'm worry free since I only have to inflate the tires and change the chain from time to time.
I park indoor as well.
But I had to deal with the common problem with internal gears of jumping chain when the chain start to get loose. I solved the problem by making my own jump stop chain. Those internal hubs are winter proof to me. No hassle.
The colder it is the more you will see me outside riding it.
Last edited by erig007; 09-28-12 at 03:39 PM.