Aerodynamics

9Velo CD55 Wheel Review: Quiet, Well made and Fast
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9Velo CD55 Wheel Review: Quiet, Well made and Fast

9Velo is a relatively new company based in the Chinese coastal city of Xiamen. They are well versed in the manufacture of wheels with a claimed 50 years+ of combined engineering experience within the organisation. These CD55 wheels are the first to feature their new axial freewheel system which has up to 54 teeth of engagement. This is a well engineered wheelset and good value for money.

Ascent Polaris Wheel Review: Complete CRAP, Avoid them
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Ascent Polaris Wheel Review: Complete CRAP, Avoid them

Introduction Ascent is a company based in Singapore who make a bicycle parts. A relatively young company, they have been around on the market for a few years. The wheels on tested were their Polaris with DT 180 hubs and carbon spokes. Ascent have stated their rims are made in China by a third party…

Modern Real World Cycling Aerodynamics
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Modern Real World Cycling Aerodynamics

Cycling aerodynamics in recent times has been dominated by “wind tunnel data” used by vendors to highlight the benefits of their particular wheel or frameset. This data has often been shrouded in marketing spin accompanied by some lavish blurb about yaw angles. However, there has been a recent trend towards discounting this data or at…

Bicycle Wheel Power Data 50km/h
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Bicycle Wheel Power Data 50km/h

Over several years, bike wheels have been tested for aerodynamic performance. To date, this is the largest independent dataset available. Popular brands such as DT Swiss, SwissSide, Shimano, Mavic and Bontrager have all been tested. This dataset was originally derived from wind tunnel test data but has latterly moved over to Dinitriev number with a…

Bicycle Wheel Power Data 30km/h
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Bicycle Wheel Power Data 30km/h

Over several years, bike wheels have been tested for aerodynamic performance. To date, this is the largest independent dataset available. Popular brands such as DT Swiss, SwissSide, Shimano, Mavic and Bontrager have all been tested. This dataset was originally derived from wind tunnel test data but has latterly moved over to Dinitriev number with a…

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