Replace the plain black plastic cap in the center of your upper triple clamp with this beautiful thermometer from Wunderlich. This part is especially useful in cold weather because it can alert you when the temperature nears freezing. The thermometer is set in an attractive machined aluminum housing and simply presses into the center hole after removing the original plug. It is held in place with an o-ring and vented so it won't push out with temperature or elevation changes. The scale is in both Celsius and Fahrenheit.