The benefit of aero race wheels is that they reduce your overall drag and make you faster. In 2012, I wrote a blog article that discussed how much time you’d save by reducing your drag while traveling at speeds between 1-30mph. In that article I discussed how there is a common misconception that you have to be traveling at a certain speed for race wheels to be of any benefit. The truth is, that is false. In reality, the slower you go, the more time you save over a distance. That’s right, if you were to ride 40km at 30mph you would save less time then if you were to ride 40km at 20mph. While counterintuitive, the best explanation I can give is riding at slower speeds allows you to experience the benefits of reduced drag for a longer period of time since it takes you longer to complete the course.

Since I wrote the first article, we’ve released all of our new wheels and have updated our Net Drag Reduction Value formula based on our Data Collection Project. Today, I wanted to share all of the new time savings charts for each of our new wheels for relative velocities between 1-30mph. **Before We Start**

Before we discuss the results, let’s first discuss relative velocity, and the math behind the time savings calculated below. **Relative Velocity**

**The Math Behind the Numbers**

In the original post FLO Cycling – Cycling Wheel Aerodynamics – How Speed, Time, and Power are Affected by Reducing Drag, there is a detailed discussion of the math behind the calculations below. If you are interested please take a look. __FLO Carbon Clincher Wheels__**FLO 45 Carbon Clincher – Time Savings between 1-30mph**

**FLO 60 Carbon Clincher – Time Savings between 1-30mph**

**FLO 90 Carbon Clincher – Time Savings between 1-30mph**

**FLO DISC Carbon Clincher – Time Savings between 1-30mph**

__FLO Aluminum + Carbon Wheels__**FLO 60 Aluminum + Carbon – Time Savings between 1-30mph**

**FLO 90 Aluminum + Carbon – Time Savings between 1-30mph**

**FLO DISC Aluminum + Carbon – Time Savings between 1-30mph**

__FLO Aluminum + Carbon Wheels__

**FLO 30 – Time Savings between 1-30mph**

I see what you're getting at, but times saved as a percentage of total times seem to be similar/the same.

For example, for the FLO 45 CCs at 20mph, it's a 2.22% savings. It's also 2.22% for the FLO 45 CCs at 30mph.

Am I missing your point?

Gregory,

Since the Cd for each scenario stays the same, the drag reduction also stays the same. If you work out the time savings, the percentage will be the same as well.

Take care,

Jon

How can I calculate time savings, ways or grams of drag (either is fine) of 45 CC on a 6% grade HC climb vs stock box rim?

Robert,

I'd look into http://www.analyticcycling.com/. They have a number of calculation tools that should help you out.

Take care,

Jon

Is the time savings per wheel or wheelset ?

Thank you

roots-n-rocks,

The original article linked at the beginning of this article highlights all of the details/math behind the numbers. Here's an excerpt from that article.

The following shows the savings for each wheel. Remember if you have two wheels multiply the savings by two.I hope that helps,

Chris

So, it doesn't seem like having the disc vs the 90 is much of an advantage for an Ironman, given the weight difference and how that might effect the climbs. No?

Fiscally Sane Resident,

Thanks for writing. This article will give you a really good look at all of our wheels combos and how much time they will save you on a couple of sample Ironman courses. http://flocycling.blogspot.com/2016/05/flo-cycling-aero-vs-weight-part-3.html

Please let me know if you have any additional questions.

Take care,

Chris