Rolex · GMT-Master
Strap for GMT-Master II Stainless Steel / BLRO / Jubilee
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the GMT-Master 126710BLRO-0001 (aka: M126710BLRO-0001)
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
Matte Blue Alligator Strap€270
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
The GMT-Master 126710BLRO-0001 (aka: M126710BLRO-0001), seen from the bench
Frequently asked questions
What is the lug width of the Rolex GMT-Master 126710BLRO-0001?
The lug width of the Rolex GMT-Master 126710BLRO-0001 is 20mm. This measurement is standard across the entire current GMT-Master II generation and must be strictly respected when selecting any aftermarket strap, in order to avoid lateral play or fitment issues.
What is the best strap for the Rolex GMT-Master 126710BLRO-0001?
The choice depends on intended use. For formal settings, a glossy navy alligator strap complements the bicolour Pepsi bezel without competing with it. For daily wear, a vegetable-tanned calf leather strap develops a distinctive patina over time. For sport or water-adjacent activities, a woven nylon NATO or vulcanised rubber strap provides water resistance and practicality. In all cases, the required lug width is 20mm.
How do you change the strap on a Rolex GMT-Master 126710BLRO-0001?
The strap is removed using a dedicated spring bar tool or a thin flat-head screwdriver inserted into the lug channel to compress and release the spring bars. The operation does not require professional tools, but care must be taken to avoid scratching the 904L Oystersteel case. It is advisable to work on a soft surface under adequate lighting.
Are there aftermarket straps compatible with the Rolex GMT-Master 126710BLRO-0001?
Yes. Any strap with a 20mm lug width is technically compatible with the Rolex GMT-Master 126710BLRO-0001, provided the spring bars have the correct diameter (1.78mm standard). Milano Straps offers a wide selection of handcrafted 20mm straps in leather, NATO and rubber, made from selected materials and available in bespoke versions through the Casati Milano atelier.
How long does a leather strap last on a Rolex GMT-Master?
Longevity depends on the material and conditions of use. A quality alligator strap with vegetable tanning and hand finishing can last between 3 and 7 years with proper care — avoiding prolonged exposure to water, perspiration and direct sunlight. A vegetable-tanned calf leather strap typically lasts 2 to 4 years. Casati Milano straps carry an 18-month warranty against manufacturing defects.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

