Dont you find your knees get cold riding in shorts?
I mean I have a couple of previous knee injuries that means my knees are a little sensitive to the "cold" (no such thing really here in Australia) but still
For example, we are in the middle of "winter" here (again, no such thing here really) and it was about 5 deg C this morning when I headed out
Light base layer, long sleeve jersey (not wind proof though) and long bib tights other wise I find I have real issues later in the day with knee pain
Im amazed you guys are riding up moutain passes with snow banks either side in shorts!