Measuring chain line is relatively easy; all you need is a ruler or calipers and your bike. Measure from the centerline of the frame to the center of your chainring to the nearest millimeter.

One of the most notable things that happened during Thursday night's Hall of Fame Game was the debut of the NFL's new virtual measurement system.

As the league first announced back in April, 2025 marks the first full season that the NFL will partner with Sony in the use ...

The NFL announced in April it will begin using Sony's Hawk-Eye technology as the primary way to measure the line to gain, ...

The NFL is debuting new virtual measurement technology, utilizing optical cameras to determine first downs during games. Here's how it works.

The NFL debuted brand new technology Thursday night at the Hall of Fame game between the Chargers and Lions in Canton, Ohio.

If your chain slack measurement falls outside the manufacturer's specified value, it's time for an adjustment. Place the bike on a center stand and loosen the rear axle nut.

From “R.T.” (October 2016): “After reading your review on the Chain Monkey — an answer to a question no one asked. I see you had it on your Versys, my 2016 like yours clunks bad about half the time.