The key to our Gravel Wheel Design Journey and determining how a rim could improve rolling resistance was accurately measuring the rolling resistance of different tire and rim combinations.
Note: If you’d like to learn more about rolling resistance, please check out Part 1 of this series.
First, we measured rolling resistance on rollers. Tom Anhalt is the king of rolling resistance testing on rollers. So naturally, we reached out to Tom and had him walk us through the tools needed and the best protocol to follow.
Eventually, we would have to hit the road for true rolling resistance measurements, so we didn’t plan for an in-depth view of all the tires. Additionally, there are a number of recent studies that show how rolling resistance is affected by the surface of the road and something called impedance. Tom Anhalt and Josh Poertner, over at Silca, have pioneered this area of work. We will be adding to this research later in this series.
Can We Measure Rolling Resistance
On-road rolling resistance is a difficult thing to master. Before measuring on the road, we wanted to ensure we could get predictable results on rollers. If we could solve for known values, then we could comfortably move to the road for testing and determine a protocol that would work.