Strap for Grantour Flyback Stainless Steel / Black / Strap

The lug width of the Tudor Grantour 20551N-0001 is 22mm. This measurement is taken by inserting a calliper between the lugs at the point where the strap attaches to the case. It is essential to verify this measurement before ordering an aftermarket strap to ensure a perfect fit without lateral play.

The choice of material depends on intended use. For formal occasions, alligator with vegetable tanning offers sustained elegance and regular texture. For daily wear, natural fat-liquored calf leather is the most versatile choice due to its ability to develop patina over time. For sports or outdoor activities, NATO nylon straps provide durability and practicality. FKM rubber is ideal for those preferring minimal maintenance.

Changing the strap requires a specific tool to extract the spring bars that hold the strap to the case lugs. Insert the tool carefully from the sides of the case and gently push the spring bar outward. Once the old strap is removed, align the new strap with the lugs and reinsert the spring bar until it clicks into place. Avoid abrupt movements that could scratch the case.

Yes, the Grantour is compatible with any standard 22mm strap from third-party manufacturers, provided the construction quality of the buckle (deployante or pin) is suitable for the weight of the case and movement. We recommend verifying that the spring bars are stainless steel to prevent oxidation over time.

The lifespan of a leather strap depends on intensity of use and material type. A natural fat-liquored calf strap typically lasts 3–5 years of daily use whilst developing characteristic patina. Vegetable-tanned alligator is more resistant and can last 5–7 years. Nylon NATO straps exceed 10 years without structural failure. Regular care and seasonal rest significantly extend longevity.