How To Change Watch Strap: Step-by-Step For All Bars Types

How to change watch strap correctly is something many watch owners want to know, yet often get wrong due to using the same method for different strap attachment systems. This guide shows you how to change a watch strap safely and accurately, based on three common types of clasps and bar mechanisms. It helps you avoid scratched lugs, a poor fit, and unstable installation, while giving you the confidence to swap straps quickly with clear steps and dedicated video guidance for each type.

Before changing a watch strap: Identify the bars type right

Before learn about how to change watch strap correctly, the two most important things you need to confirm are the attachment type and the lug width. Identifying the correct attachment type first ensures the method you use is safe for both the watch case and the strap, and helps prevent scratches or improper installation.

• Fixed bars: The metal bar between the lugs does not compress or move, and there is no visible gap to insert a tool.
• Regular spring bars: The bar is removable and slightly spring-loaded, compressing inward at both ends. These are typically removed with a spring bar tool, and some watches also feature drilled lugs that allow the bar to be pushed out from the side.
• Quick-release spring bars: A small sliding lever is visible on the underside of the strap near the lugs. This mechanism enables the strap to be removed and installed by hand without any tools.

Always match the strap width exactly to the lug width. A 20mm lug requires a 20mm strap, not larger or smaller. Common lug widths include 18mm, 20mm, and 22mm, while sizes like 19mm or 21mm are less common but still widely used.

How to change watch strap for different bar types

Not all watches use the same attachment system, and using the wrong method is the fastest way to scratch your lugs or damage a strap. This section breaks down how to change a watch strap based on the four most common bar types you’ll encounter.

Fixed bars

Watches with fixed bars use solid, non-removable metal bars. Because the bars cannot be detached, the strap must be threaded through rather than clipped on and off.

To change a watch strap with fixed bars, the old strap is unthreaded completely from the bars, then the new strap is carefully fed through, following the same path. The key is to keep the strap aligned and avoid twisting the leather while threading it into place.

Regular spring bars

Regular spring bars are the most widely used system. These bars use internal springs that compress to release the strap from the lugs.

The strap is removed by compressing the spring bar inward and easing it out of the lug. When installing a new strap, one end of the spring bar is positioned first, then the other end is compressed and guided into place until it locks securely.

Quick-release spring bars

Quick-release spring bars are designed for fast, tool-free strap changes. They feature a small lever on the underside of the strap that allows the spring bar to be compressed by hand.

To change the strap, the lever is pulled inward to release the bar from the lug. Installation follows the same principle, placing one end of the bar first and using the lever to guide the other end into position. Once released, the strap should sit firmly against the case.

NATO watch strap

A NATO watch strap uses a pass-through design and does not require removing spring bars at all. The strap is threaded through both sets of lugs and secured using built-in keepers, providing an extra layer of security.

To install a NATO strap, the strap is fed through the lugs from top to bottom, then looped back through the secondary keeper so the watch head sits centered. Adjusting the length ensures a comfortable fit while keeping the watch stable on the wrist.

The article above has compiled common types of watch strap attachment systems and clear instructions on how to change watch strap. Hopefully, this article helps you identify the correct mechanism on your watch and replace the strap confidently without causing scratches or fit issues. Visit handdn.us to see more leather watch strap options if you are looking for high-quality, customizable straps designed for long-term use.