I finally got a chance to really test some of my Assos clothing last Saturday morning, when it was in the upper 20's. I used an 851 Jacket over an older Rapha long-sleeved jersey, with Assos Roubaix knee-length bib tights. I wore Smartwool over-the-calf length thin ski socks, and some Specialized gloves that were not quite warm enough, being made for the 50's. My body was quite toasty, but I was still breathing cold air, and developed an episode of asthma worse than anything I had experienced since a teenager, almost 30 years ago. Before this, I had ridden when it was in the mid-to-upper 40's, but no colder.

I probably should have worn something on my head, under the helmet. It miight have made a difference. Possibly something on my face, too?

I don't claim to have any answers here; just relating my experience this past weeekend. I will need to train through the winter to have any hope of making the proposed one-day Houston-Austin ride in May. I will follow this topic.

By the way there is a winter cycling forum here on Bikeforums, too.

(Edited to correct some horrendous typos.)