The Rolex GMT-Master II takes a 20mm strap in every generation — the 40mm case never changed size. What changed is the movement: Calibre 3186 (ref. 116710, 48-hour reserve) vs Calibre 3285 (ref. 126710, 70-hour reserve). Red Sailcloth FKM is the boldest match for a model with red bezel accents; black alligator dresses the watch up for business. Send Zenio photos of your watch, reference and clasp to order.
Start with the Custom Watch Straps collection or use the Strap Finder to find your model.
Rolex GMT-Master II — Specifications
| Model | Case | Thickness | Lug-to-lug | Lug width | Movement | Water resistance |
|---|---|---|---|---|---|---|
| GMT-Master II ref. 116710 (2007–2019) | 40mm | ~12.1mm | 48.5mm | 20mm | Calibre 3186, 48-hour reserve | 100m |
| GMT-Master II ref. 126710 (2018/2019–present) | 40mm | ~12mm | ~48mm | 20mm | Calibre 3285, 70-hour reserve | 100m |
Sources: Bob's Watches — Rolex 116710LN Review (40mm, ~12.1mm, lug-to-lug 48.5mm, Calibre 3186, 48-hour reserve, 20mm taper); Grymrkt — Rolex GMT-Master 126710BLNR Specs (40mm, 20mm lug width, Calibre 3285, 100m). Unlike the Submariner, the GMT-Master II did not grow a millimetre in its 2018/2019 update — it stayed 40mm with a 20mm lug width in both generations. So the size question is simple; the question that matters is which reference you own, because the case shape and clasp differ.
Strap Ends — Curved or Straight?
A GMT-Master II strap must do more than match the 20mm lug width — it has to complement the proportions of a robust sports case with strong, defined lines. Custom-shaped curved ends are shaped to follow the contours of the case, with an internal support structure holding the curve, for a closer, more integrated fit. That precision takes more time, but the result is a cleaner look tailored to your watch.
Straight ends are the versatile, quicker and more affordable option: traditional construction, a clean look with many materials, and easy to change often. Add Quick Release spring bars where compatible and you can swap straps before a trip without tools. Whichever you choose, Zenio examines your GMT-Master II's construction — and your clasp, if you want to keep it — before crafting.
Curved strap ends, close up — shaped to follow the contours of the case, with an internal support structure holding the curve.
Choose Your Material — By Occasion
| Material / Colour | Best for | Character |
|---|---|---|
| Black alligator | Business, formal occasions | Timeless elegance; turns a sports watch into a dress watch |
| Navy alligator | Everyday, Smart Casual | Sophisticated yet youthful; best with blue bezel accents |
| Blue Sailcloth FKM | Summer, travel | Fresh, energetic; best with blue bezel accents |
| Black Sailcloth FKM, Navy stitching | Business, everyday | Minimalist with a distinctive detail |
| Black Sailcloth FKM, Olive stitching | Outdoor, denim, utility outfits | Rugged, full of character |
| Red Sailcloth FKM | Standing out, bold looks | Striking; creates a colour connection with red bezel accents |
| Brown Pueblo | Weekend, heritage outfits | Vintage character; develops a natural patina over time |
Black alligator — timeless elegance; turns a sports watch into a dress watch.
Navy alligator — sophisticated yet youthful; best with blue bezel accents.
Sailcloth FKM is the natural match for this watch: the woven Sailcloth surface with a flexible FKM rubber lining is water-resistant, absorbs little moisture, resists heat and is easy to clean — exactly what a travel watch needs in hot, humid conditions. Match the FKM colour to your bezel and the strap looks made for the watch: blue with blue, red with red. Alligator does the opposite job, dressing the GMT-Master II up for the office. Brown Pueblo is the third character — vintage, relaxed, and more personal the longer you wear it, as the leather develops its patina.
Blue Sailcloth FKM — fresh, energetic; best with blue bezel accents.
Black Sailcloth FKM — water-resistant and easy to clean.
Red Sailcloth FKM — striking; creates a colour connection with red bezel accents.
Brown Pueblo — vintage character; develops a natural patina over time.
Thickness and Length
The strap is built to the thickness of your case (~12mm on both generations) and tapers from 20mm at the lugs toward the buckle, so it stays balanced on the wrist. Length is made to your wrist measurements, and Zenio can adjust the construction for a more comfortable fit in hot climates.
Order a Custom Rolex GMT-Master II Strap at Zenio
- Send photos of your watch, its model reference, clasp details and wrist measurements, so Zenio can recommend a suitable strap.
- Choose your material, colour, strap-end shape (curved or straight) and clasp.
- Zenio confirms the size, details and production time with you before making the strap. Simple straps typically take 7–10 days; special straps take 10–14 days.
- Your strap is handcrafted to order, with hand saddle stitching and hand-painted edges.
Start with the Custom Watch Straps collection, explore Alligator Watch Straps, or use the Strap Finder to find your model.
FAQ — Frequently Asked Questions About Rolex GMT-Master II Strap Replacement
Can I replace my Rolex GMT-Master II bracelet with a leather strap?
It depends on the specific model. Zenio examines the strap attachment structure before recommending a suitable option.
Is Sailcloth FKM suitable for everyday wear?
Yes. The FKM lining resists moisture, is easy to clean, and works well in hot, humid climates. FKM does not absorb perspiration, which makes cleaning and maintenance easier.
Does brown Pueblo leather change colour over time?
Yes. Pueblo leather develops a natural patina with wear, creating a distinctive vintage character.
How long does it take to make a custom Rolex GMT-Master II strap?
Simple straps typically take 7–10 days; special straps take 10–14 days.
