While most cycling computers can track distance, trip time, speed and many can provide information on temperature, grade of the road and even calories, the new Sigma 12.12Topline bike computer can provide something else – namely how many gallons of gasoline a rider may have saved by riding a bike instead of driving a car. Obviously this is a feature commuters will use more than those who take a casual weekend ride, but it is still a great way to see how a bike ride can translate into real savings.