Category Archives: Testing and Tech

The Enduro Allroad Bike

Last year’s Oregon Outback was a great test for the ultimate gravel bike. The course consisted of 1/3 rough and soft gravel, 1/3 smooth gravel and 1/3 pavement. The situation is similar to our favorite local rides: We leave from … Continue reading

Posted in Testing and Tech, Tires | 74 Comments

Why not “Made in U.S.A.”?

At Compass Bicycles, we think a lot about manufacturing. We know what we want to make, but how should we make it, and where? We are not looking for the lowest cost, but for the highest quality. The conditions under … Continue reading

Posted in Rene Herse cranks, Testing and Tech | 86 Comments

Research & Development

Over the last decade-and-a-half, I’ve thought a lot about product development. Long before Bicycle Quarterly and Compass Bicycles, I was involved with several companies as a technical writer and translator. Part of my job was writing instructions, so I got … Continue reading

Posted in Testing and Tech, Tires | 43 Comments

Tire Pressure: Data and Details

A little while ago, I wrote about how new scientific research has allowed us to design wide, supple tires that offer the speed of narrow, high-end racing tires. The key finding is that above a certain threshold, increasing tire pressure … Continue reading

Posted in Testing and Tech, Tires | 19 Comments

The Tire Pressure Revolution

Of all our research on tires, the most revolutionary finding is this: Tire pressure has almost no effect on a tire’s speed. We did not believe it at first, either, so we’ve tested it numerous times. It’s been confirmed numerous … Continue reading

Posted in Testing and Tech, Tires | 124 Comments

The Biomechanics of Planing

We discussed “planing” in a recent post by looking at power data from a double-blind test of two different bikes. The data showed that the same rider’s power output was consistently higher on a bike with a more flexible frame … Continue reading

Posted in Testing and Tech | 84 Comments

What is Planing?

Can a 650B randonneur bike climb as well as the best titanium racing bikes? It did climb as well in a Bicycle Quarterly test, and that raised a few eyebrows. After all, the randonneur bike weighed 10 pounds more… Theoretically, … Continue reading

Posted in Bicycle Quarterly Back Issues, Testing and Tech | 110 Comments