Join Date: Sep 2004
Location: Southern California
Bikes: 2013 KHS Flite 747
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
What about heat capacity and the coefficient of thermal expansion?
Just kidding - a lot of terms are being thrown about. The best way to keep cool in hot weather is to stay hydrated and to keep moving. You will sweat normally if you are hydrated, and the evaporation of the sweat by the moving air will cool you. If you have plenty of water, you can squirt a little on the shoulders/back of your jersey, which will also help. When you stop, the cooling mechanism stops also unless there is a breeze.
A white jersey will reflect more sunlight than a darker one so it will be cooler. I have a pure white jersey that I have worn for 5 or 6 years of road riding, and it is not dirty at all. Don't wipe your dirty hands on it! I have worn both white and dark jerseys in the hot southern California sun, and the difference between them is noticeable, but insignificant compared to whether you are moving or not.