Rolex · GMT-Master
Strap for GMT-Master II Stainless Steel - Yellow Gold / GRNR / 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 126713GRNR-0001 (aka: M126713GRNR-0001)
Selected for the 20 mm lug width · workshop selection
Matte Dark Gray Alligator Strap€195
Black Alligator Strap with Light Red Edging€149
Vintage Alligator Strap Cognac€195
Hammered Pink Strap with Ecru Stitching€98
Vintage Brown Calfskin Strap — Natural Patina€98
The GMT-Master 126713GRNR-0001 (aka: M126713GRNR-0001), seen from the bench
Frequently asked questions
What is the lug width of the Rolex GMT-Master 126713GRNR-0001?
The Rolex GMT-Master 126713GRNR-0001 features a 20mm lug width. This dimension is determined by the width of the lugs on the 40mm case. A compatible strap must have a width of 20mm to ensure a perfect fit without lateral play and correct tactile sensation on the wrist.
What is the best strap for the GMT-Master 126713GRNR-0001?
For the GMT-Master 126713GRNR-0001, it is advisable to choose materials capable of maintaining the elegance of the case. Nile alligator remains the most versatile choice, adapting to both formal and relaxed contexts. Swiss-quality grained calf and shell cordovan represent sophisticated alternatives, while rubber or NATO straps offer practicality for intense sporting situations without compromising the overall aesthetic of the timepiece.
How do I change the strap on the Rolex GMT-Master 126713GRNR-0001?
Changing the strap requires the use of a specific spring bar tool. Insert the flat blade of the tool into the small holes positioned on either side of each spring bar, then apply gentle outward pressure to compress the internal spring and release the bar from the case. Once the bars are removed, the old strap separates easily. Installation of the new strap proceeds in reverse, verifying that the bars are properly positioned in the lugs.
Can I use an aftermarket strap compatible with the GMT-Master 126713GRNR-0001?
Yes, it is possible to use certified aftermarket straps with 20mm lug width. Before purchase, it is advisable to verify: the exact width of the strap (20mm), the quality of the leather or chosen material, the presence of a sturdy and well-finished buckle or deployante, the reputation of the manufacturer and availability of warranty on production defects. A custom-crafted strap offers the best aesthetic and mechanical compatibility.
How long does a leather strap last on the GMT-Master 126713GRNR-0001?
The lifespan of a leather strap depends on the quality of the leather, daily use and maintenance. On average, a strap made from alligator or shell cordovan with vegetable tanning lasts between 3 and 5 years with regular wear. Factors that extend its lifespan include: resting the strap between wears, protection from extended direct sunlight and moisture, periodic cleaning with gentle products. A certified artisanal strap with production defect warranty provides additional peace of mind regarding any structural issues in the first 18 months.
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

