Strap for Black Bay GMT Stainless Steel / White / Fabric

The lug width of the Tudor Black Bay GMT 79830RB-0012 is exactly 22 millimetres. This measurement is specific to this model and allows the use of watch straps and bracelets compatible with 22mm lugs. To verify the correct measurement, use a digital calliper by inserting it into the internal space between the two lugs on the case.

Tuscan vegetable-tanned calf leather in dark brown or moro testa tone is the optimal choice for the Black Bay GMT. Vegetable-tanned leather develops a natural patina over time, complementing the tool watch philosophy of the model. Alternatively, alligator offers natural texture and superior rigidity, whilst NATO in cotton remains the most historically faithful option for this GMT.

The Tudor Black Bay GMT features straight lugs measuring 22mm. To replace the strap, remove the passants (strap loops) of the current strap from the lugs using a spring bar tool, then insert the new passants into the lug holes. Ensure that the torsion springs click correctly into their housing to prevent accidental detachment.

All straps with a 22mm lug width are compatible with the Tudor Black Bay GMT. This includes straps in calf, alligator, shell cordovan, NATO in cotton, canvas and vulcanised rubber. Always verify that the passants fit the case thickness (approximately 11.5mm) to ensure correct housing.

Durability depends on leather quality and usage patterns. A vegetable-tanned calf strap on a tool watch like the Black Bay GMT has an average lifespan of 3-5 years with daily use under normal conditions. Alligator and shell cordovan can last 5-8 years. Wear at the passant crease is natural; Casati Milano offers repairs and extension services through post-purchase support.