Moderate Headwind Tests

Strong Cyclist - August 7, 2014

The faired bike was faster and seemed stable into the headwind. The stock bike was harder to pedal. When I took the faired bike into crosswinds, I noticed that the winds pressed against the bike in a predictable way, allowing for countering with a simple lean of the bike. However, the crosswind did not turn the front wheel as much as on the stock bike, so the faired bike felt more controllable steering in the crosswind. It handled more predictably in the crosswinds than the stock bike. When I road the bike at speed around corners at the intersection, I noticed the increased traction and increased predictability in the front wheel steering. The faired bike was faster around the corner and felt safer as a result.

—Brandon Wade, August 8, 2014

1. Data Summary

A 13.6 percent gain in speed was measured using our Upper Wheel Fairings with a strong cyclist facing a 10 mph headwind. A number of tests were conducted, and the results were internally consistent, verifying the overall trend for faired upper wheels causing dramatic increases in speed. Data segments having similar headwind speeds were selected and averaged together to obtain the result. (The full report is available for download.)

2. Test Description

Power measuring tests in moderate headwinds were conducted on identical multi-speed road bikes configured with and without wheel fairings. Data was recorded using an i-bike Newton power meter. Test conditions were moderate headwinds with some variable direction.

2.1 Test Hardware

Two identical 56 cm steel-frame bicycles from Motobecane (Gran Primio) were used to compare a stock configuration with a faired configuration, under similar headwind conditions. The bikes included Shimano 105 deraileurs and Mavic tapered rims with 32 spoke counts on both front and back.

Power measurements were taken with an ibike Newton power meter - updated to the latest firmware (V4.14)-with all tests set to 1-second recording intervals. The filter was set to 5-seconds.

Novice Rider - August 4, 2014

1. Test Summary

The best available data taken on August 4, 2014, indicates that the use of our Upper Wheel Fairings on a typical road bike with a novice rider under moderate headwind conditions yields gains in average speed exceeding 10 percent (15 percent was recorded). (The full report is available for download.)

Power measuring tests in moderate headwinds were conducted on identical multi-speed road bikes configured with and without wheel fairings. A novice cyclist was the rider. Data was recorded using an i-bike Newton power meter.

2. Implications

The results confirm that the use of our Upper Wheel Fairings can significantly increase headwind penetration speeds of a novice rider under moderate headwind conditions. Gains exceeding ten percent are likely.

 

 

 

 

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