Our Saturday morning bike ride swells to as many as 80 riders in the summer but has as few as four to ten riders during the winters which are mild in Alabama. Why the difference? Riders complain about cold and wind with their fingert and toes being numb and I suspect also it is just harder to leave a warm bed for a cold outdoor ride. Cool rides actually are my favorite, much more so than hot rides. I also noted that the Swiss tend to ride rain or shine in hot or cold weather and seem to do fine. I think the main variable is personal comfort and if you dress well for the cold, it is actually a fairly pleasant experience. So how do you dress for the cooler temps?
When I first started riding bikes in the winter, I would just pile on more clothes until I felt warm. I was so overdressed and overstuffed that riding a bike was tough but I was warm, and quickly became hot with no place to store the excess clothes as I heated up other than to tie jackets around my waist. Most of the experienced riders, particularly the race oriented ones, seemed to have little on and what they were wearing fit them close to the body rather than flapping around like my jackets and/or sweatshirts. What I've come to realize is that there are two dressing components to staying warm; fleecy (i.e. thick) clothes for warmth, and, wind blocking clothes to keep the apparent wind from reducing your body temperature. In looking for clothes for cool riding, look for things with a fleecy nap. For example in the photos below, the grey top which is a Patagonia expedition fleece underwear top has much more nap than the straight polypro blue shirt on the left. Both are great for wearing under a bike jersey and the grey one is very warm. The reason is that the nap holds body heated air which gives you a thermal blanket around your skin that is much warmer than that of a thin undershirt.
Even more important than the thickness of the undershirt nap is the ability of material to block the air from coming through your clothes and whisking away the warm air around your body. My favorite cool weather piece to remedy this is a vest that goes by the tradename Windstopper produced on Gorewear products. I'm sure there are other equally good similar materias as long as they stop the air from moving through your clothes. Racers of yore for example would put newspapers under their jerseys over their chest which actually is a pretty effective way to stop the breeze through your clothes and insulates your body. The Gore Windstopper vest fits close to the body, completely stops the wind on your front, and has a mesh open back section to let out water vapor to keep you dry.
Pictured at left is the back and front/side of this piece worn with a normal short sleeve jersey, a polypro undershirt, and arm warmers. This outfit along with biking pants that cover the knees will carry you well down into the low 40's in comfort. For colder weather, you can get the windstopper in a thin jacket with sleeves or add a more substantial fleece long sleeve undershirt or jersey. Gore makes a long sleeve heavily napped fleece jersey with windstopper and riders that wear it suggest that by itself or with a thin polypro undershirt, they stay warm down into the 20's. The way your body works is to shut down blood flow to the extremities if the trunk is cold to better preserve your vital organs. Therefore, you can't have warm hands or feet without a warm trunk.The arm warmers are handy for cool weather particularly when the day starts cool but warms up. They are made of Lycra which is stretchy to hold them in place, but not particularly thick or warm and the air will blow through them making them better at cool weather than cold. They are sized (S,M,L,XL) based on your arm girth, so be sure to get the right size or they will continually slip down. In addition to stopping the wind from blowing by your trunk and pulling off the thermal air layer, your head has to be protected from the cold. Due to the high number of blood vessels in the scalp, a great deal of heat can be lost through the head.
There are a variety of head coverings bikers use ranging from helment covers to full head, face, and neck covers such as a Balaclava. Some riders wear neck covers and others favor ear muffs. For really cold days, the Balaclava (pictured at far right) is very warm and versatile in that the face opening can be pulled down to expose the full face or pulled up over the nose to only explose the eyes which are usually covered with sun glasses. I personally find the Balaclava to be too warm. Further, it traps moist air from your breathing making it wet in front of the face if it is pulled up over the nose. There are a variety of caps or head coverings such as a bandana that work well depending on the temperature. My personal favorite is a wool watchman's cap that is not too thick but has the advantage of being rolled up or down to cover or expose the ears depending on the extent of the cold. Because of the way your ears stick out, they can become extremely cold to the point of frostbitten in very cold weather when riding. Take your helment with you when purchasing any head covering to be sure the head covering will fit comfortably under a helment. Both of the two pictured head coveringswork well under my helment.









