it was 23F when alarm went off. I reset it. I am afraid that the caliper will lock up in the 20's. The bike shop said that the caliper should be in today. So I drove to bring in the bike and it is supposed to rain. I found my QR for the trainer so I am going to swap the tires and set it up. I guess it is time get the trainer set up since we have the space in the house.