Wheel comparison tool: the reality behind the marketing promises
We all know the tune, and it is what pushed me to create this wheel comparison tool. A big brand releases a new pair of wheels at €2800 and promises you “12 watts saved at 45 km/h” or “10 minutes gained on the Etape du Tour”. You look at your current wheels with disdain, you get out your credit card, and the following Sunday… surprise: you are not flying, your wallet is just lighter.
The problem is that these tests are carried out in the wind tunnel, often without a rider, or at speeds (50 km/h) that 99% of us only hold on a mountain descent. Marketing sells dreams, physics imposes reality.
To stop fantasising over advertising brochures, I developed this unique wheel comparison tool. It cross-references my wheel database with real physical models to give you not a promise, but a reliable order of magnitude.
Your wheel comparison tool: performance simulator
Select your favourite climb, enter your data and compare different types of wheels.
Wheel Comparison Tool
Contents
What the wheel comparison tool reveals
If you have played with the tool honestly, it must have come as a shock. Between a basic aluminium wheelset and a premium carbon pair at €3000, the gap on a mountain climb is often counted in… seconds. Not minutes. And on the flat, at an average of 30 km/h, the gain is barely perceptible.
The limiting factor is you (80% of it)
Let’s be clear: on the flat, around 80% of total aerodynamic drag comes from the person sitting on the bike. The wheels represent only a fraction of the remaining 20% (the bike).
Conclusion: Swapping a 30mm rim for a 50mm one without working on your position (jersey zipped up, elbows bent) is like putting a Formula 1 wing on a Twingo. It is marginal.
If watts don’t matter that much, how do you choose?
This is where I am getting at. My tool is not there to tell you “don’t buy anything”. It is there to free you from the dictatorship of performance. Since the simulator proves you will not be “dropped” with your current wheels, you no longer have to buy “the fastest” on paper. You can finally buy the one that puts a smile on your face for the real good reasons.
FAQ: your questions about wheels
Are ceramic bearings really worth the cost?
It is probably the biggest marketing lie of the century. The difference in friction between a clean steel bearing and a ceramic one is in the order of 0.5 watt… at 50 km/h. On the other hand, a poorly maintained ceramic bearing wears quickly. Save your money for good tyres.
What real time saving can you expect with aero wheels?
According to my simulator and field tests: for a cyclist riding alone into the wind at an average of 30 km/h, the gain is around 40 to 60 seconds over 40km on the flat compared with basic wheels. It is measurable, but it will not turn a carthorse into a racehorse.
Does wheel weight matter when climbing?
Yes, but less than you think. Saving 200g on the wheels will gain you around 5 to 10 seconds on a one-hour climb at 8%. The feeling of liveliness will be better, but the stopwatch will remain merciless.
Further reading
You now have a clear picture of wheels. But did you know that your tyre pressure setting has far more impact on your efficiency and comfort than your rim material? A great carbon wheel that is badly inflated is an anvil. Use my other tools to optimise your machine.
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