Category: Cycling

Notio – Aero meter #CDA

paschmann

This did not end up lasting too long. Some interesting insights from the device, but accuracy especially with something like CDA is very nuanced.

Key take away, continue to use Best Bike Split (software derived CDA versus this physical device).

This was one of my test from Huntersville Business Park:

Test Conditions

  • Weather: Hot
  • Bike Setup: Fully loaded with 2 water bottles, no tools
  • Note: Rear radar moved during testing
  • Coefficient of Rolling Resistance (Crr): 0.004
  • Rider Weight: 190.08 lbs
  • Tire Circumference: 2136 mm
  • Calibration Factor: 1.39

Key Findings

  • Visor position: Down position saved ~0.007 CDA (Notio) / ~0.002 CDA (BBS)
  • Calf sleeves: Minimal impact – ~0.001 CDA (Notio) / ~0.009 CDA (BBS)
  • Direction matters: Counter-clockwise on this HBP loop showed higher drag in both systems
  • System difference: Best Bike Split consistently reads 0.044-0.092 higher than Notio
  • Best configuration: No sleeves + visor down = 0.222 CDA (Notio) / 0.2843 CDA (BBS)
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    OpenAero – A open source design system for Bike Accessories

    paschmann

    After designing, building, rebuilding, and re-printing dozens of accessories for my bikes over the last few years, I wanted to create and share a open source design system for accessories for bikes that allows myself (and a community) to innovate and collaborate on these types of products. Here is a snippet from the readme file:

    Our goal is to develop a modular mounting system for bicycle accessories — ranging from water bottle holders and lights to phone and cycling computers. Partially inspired by Gridfinity, this system provides a base platform and is intended to be stackable. The motivation behind the definition and open source nature of this project is to encourage community-driven design and innovation in the triathlon space. read more

    2024 – Ironman 70.3 – North Carolina

    paschmann

    3 years of doing 70.3 IM NC. Such a fun race in one of my favorite coastal towns of Wilmington/Wrightsville beach. Overall, a great race. 6th this year compared to 5th from last year, but due to the fast swim current, I improved my swim 8 minutes. On the bike I had a major rookie mistake and forgot to load my nutrition bottle on the bike, which meant stopping at the first aid station and loading up as much as I could carry, giving up some time, but also really important. There my bike was 2 minutes slower than 2023. On the run, I was right around the same as previous years with a 1:28. The 5th place finisher was over 2 minutes ahead of me, so I needed quite a considerable improvement to catch up to them. read more