On Tuesday, I had the opportunity to ride with the TRP HY-RD hydraulic disc brake and the Spyre dual piston mechanical disc brake, both designed for road and cyclocross bikes. I shared my impressions ...

Almost a year ago, we did our first ride on the TRP Spyre dual piston mechanical disc brake and wrote this lengthy review, but quite a lot has changed in the last year. Unfortunately both the Spyre ...

It goes up, compresses a violent explosion, and goes down. A piston's job is easy enough to understand, but if you examine what it's required to do, you may be amazed it works at all. Think about ...

As you wouldexpect, there are several areas within an engine where frictional losses are created, at the very minimum. Also consistent with conventional wisdom is the fact they are unavoidable and can ...