Best Straps for the Rolex GMT-Master II Batman

At a Glance

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The Rolex GMT-Master II "Batman" is one of those watches that needs no introduction. The blue and black Cerachrom bezel — the reason for the nickname — is immediately recognizable, bold without being flashy, and unlike anything else in the Rolex lineup. It's a tool watch at heart, designed for pilots and travelers who need to track multiple time zones at a glance. But it's also become one of the most desirable sport watches on the planet, and for good reason: the 126710BLNR hits a rare balance of ruggedness, legibility, and visual drama.

Here's the thing about the Batman, though: it's a phenomenal strap watch. The Oyster bracelet is excellent, but it only tells one side of the story. Put the Batman on a navy rubber strap and the blue half of the bezel comes alive. Put it on black sailcloth and the whole watch goes stealth. The 40mm case, the sporty DNA, the bold bezel — they all respond remarkably well to strap changes, and in ways that a more conservative Rolex simply can't match.

I've been testing straps on the 126710BLNR for months, and these are my 7 picks — each one chosen to bring out a different side of the Batman's personality.

Quick Specs

The Batman uses a 20mm lug width — the same as the Submariner, Datejust 36, and Explorer — so your strap options are extensive. But where the Batman differs from most Rolex sport watches is in its colour personality. That blue and black bezel creates a very specific palette: navy straps pick up the blue half and create a tonal, cohesive look. Black straps lean into the dark side and make the watch feel more tactical. Neutral tones work if they're cool-toned — warm browns and tans can clash with the blue ceramic. When in doubt, stay within the blue-black-grey spectrum and you won't go wrong.

The 126710BLNR does not have drilled-through lug holes, which is standard for modern Rolex references. Strap changes are still straightforward with quick-release spring bars — more on that below.

Already know what you're looking for? Browse all GMT-Master-compatible straps on the Strap Finder →

Best Overall — Navy CTS Rubber (Plain)

If you're buying one strap for your Batman, make it this one.

The Navy CTS Rubber Strap is the most natural pairing in this entire lineup — and it's not even close. The navy colour picks up the blue half of the Cerachrom bezel and extends it down the wrist, creating an immediate visual continuity that makes the whole watch feel like it was designed for this strap. The black half of the bezel still provides contrast, but the overall impression is cohesive, tonal, and intentional. It's the kind of combination where people assume it came from the factory that way.

Made from FKM fluoroelastomer — the same compound used in high-performance automotive seals — the CTS Rubber is waterproof, UV-resistant, and completely impervious to sweat, sunscreen, and salt water. On a 100m water-resistant GMT designed for travel and adventure, that durability isn't a luxury; it's the right material for the job. The CTS (Cut-To-Size) design lets you trim the strap to your exact wrist measurement, so there's no leftover tail or strap keepers to deal with. The included deployant clasp has micro-adjustment positions on each side for fine-tuning throughout the day — particularly useful on long flights when your wrist swells.

At 3mm thick, the strap sits flat against the wrist and keeps the 40mm case looking proportional. It's the do-everything strap: pool, airport, office, dinner. No break-in, no maintenance, no second thoughts.

Other CTS Rubber colours worth considering for the Batman:

• Black CTS Rubber (Plain) — goes full stealth; the Batman disappears into the dark side
• Grey CTS Rubber (Plain) — a sophisticated neutral that softens the bezel contrast

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Dressy — Navy Alligator Signature (Matte)

Most people wouldn't put alligator on a sport watch. That's exactly why this works.

The Matte Navy Alligator Signature Strap uses skins sourced from Haas, one of France's most prestigious exotic tanneries. The matte finish is critical here — a glossy alligator would tip the Batman into territory that contradicts its tool-watch DNA, but matte reads as textured and understated rather than flashy. The natural scale pattern catches light subtly, adding visual depth without demanding attention. It's luxurious in a way that rewards a closer look rather than announcing itself across the room.

The Signature profile (4.5mm tapering to 2.2mm at the buckle) gives the 40mm case real presence on the wrist. The saddle stitching runs cleanly along the edges, adding a handcrafted detail that steel and rubber simply can't replicate. And the navy colour? It ties the whole thing together — connecting to the blue Cerachrom insert while the dark tones of the leather sit comfortably alongside the black half of the bezel. The combination turns the Batman from a sport watch into something that can anchor a suit or a blazer without blinking.

This is the strap for weddings, dinners, client meetings — occasions where the Jubilee bracelet might feel too casual but you still want to wear your favourite watch.

Other alligator options for the Batman:

• Matte Black Alligator Signature — the monochromatic power move; all dark, all texture
• Matte Grey Alligator Signature — a cooler, more neutral tone that bridges the blue and black

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Everyday — Black Epsom Slim

A daily leather strap needs to be three things: comfortable from hour one, tough enough to handle real life, and visually quiet enough to work five days a week. The Black Epsom Slim delivers on all three.

Epsom leather is produced by Haas in France — the same tannery behind some of the world's most recognizable luxury goods. The cross-hatch grain is created by embossing calfskin under pressure, which does two things: it makes the surface naturally resistant to scratches and water marks, and it gives the leather a clean, structured look that reads as professional without trying too hard. Scuffs and minor marks tend to disappear into the pattern rather than standing out — exactly the quality you want in a strap you're reaching for every morning.

On the Batman, black Epsom creates a deliberately understated pairing. The strap absorbs into the black half of the bezel and recedes, letting the blue ceramic and the dial do the talking. There's no colour competition, no visual noise — just a clean, versatile base that works with everything from a t-shirt to a sport coat. At 2.2mm throughout, the Slim profile keeps the GMT-Master looking lean and proportional, sliding under a shirt cuff without any fuss.

This is the strap for the person who wears their Batman every day — to the office, to dinner, on the school run. It just works.

Other Epsom colours for the Batman:

• Navy Epsom Slim — picks up the blue bezel half; a more colour-coordinated everyday option
• Grey Epsom Slim — a cool neutral that bridges the blue and black tones beautifully

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Minimalist — Navy Saffiano Stitchless

The Batman is a sport watch — but that doesn't mean it can't dress up. The key is choosing a strap that elevates without contradicting the watch's DNA.

The Navy Saffiano Stitchless Strap strikes that balance perfectly. The stitchless construction removes all visual noise — no thread, no contrast details, just clean leather and precision edge paint. On a watch that already has plenty going on (blue/black bezel, GMT hand, date window), this minimalism is exactly right. The cross-hatch grain of Saffiano leather adds texture without bulk, and the navy colour creates a seamless connection with the bezel that feels deliberate and polished.

Saffiano's cross-hatch pattern is created by embossing wax over calfskin — a process that makes it naturally resistant to scratches and water. Despite looking refined, it's surprisingly tough for daily wear. At 2.2mm, the Stitchless profile keeps the GMT-Master looking clean and lean — it won't fight for attention with the bezel, and it slides under a shirt cuff effortlessly.

This is the strap for smart-casual occasions — a dinner out, a work event, travel days where you want to look pulled together. The Batman retains its identity but gains a polished edge.

Alternatives:

• Black Saffiano Stitchless — the monochromatic stealth option; ultra-clean
• Grey Saffiano Stitchless — a cooler, slightly lighter alternative that pairs well with the steel case

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Sporty — Black CTS Rubber Tropical

If you want to lean fully into the Batman's tool-watch heritage, this is the strap that does it.

The Black Tropical CTS Rubber Strap takes everything that makes the standard CTS Rubber great — FKM fluoroelastomer, Cut-To-Size trimming, deployant clasp with micro-adjustment — and adds a vintage-inspired tropical pattern. The small circular perforations across the surface aren't just decorative; they improve airflow against the skin, which makes a real difference during active wear in warm climates. It's a nod to the perforated rubber straps that divers and pilots wore in the 1960s and 70s, updated with modern materials and precision engineering.

On the Batman, the black tropical rubber creates a decidedly sporty, almost tactical aesthetic. The perforated texture adds visual interest that a plain rubber strap doesn't have, and the matte black colour lets the blue/black bezel remain the focal point. There's a retro-cool quality to the combination — it makes the GMT-Master feel like it belongs on the wrist of someone who actually uses it as a travel tool, not just an investment piece sitting in a safe. At 3mm thick, it sits flush and comfortable, with enough suppleness to conform to your wrist from the first wear.

This is the strap for beach holidays, diving trips, weekend hikes — anywhere the Batman needs to perform without you worrying about the strap.

Other tropical rubber options for the Batman:

• Navy Tropical CTS Rubber — the perforated pattern in navy; picks up the blue bezel half with added texture
• Grey Tropical CTS Rubber — a softer neutral that sits between the blue and black tones

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Casual — Navy Pueblo Slim

The Batman's blue-and-black bezel is bold enough on its own. Sometimes you want a strap that echoes that energy without competing with it — and that's where Pueblo leather earns its place.

The Navy Pueblo Slim Strap is produced by Badalassi Carlo, one of Italy's most respected vegetable tanneries. The leather has a uniquely textured surface — slightly rough, almost waxy — that gives it a worn-in, vintage quality from day one. But the real appeal is what happens next: Pueblo develops one of the richest patinas of any leather in the Delugs lineup. Within a few weeks, the surface smooths out, the colour deepens, and each strap becomes genuinely one of a kind.

At 2.2mm, the Slim profile keeps things relaxed and lightweight — a deliberate contrast to the GMT-Master's substantial 13.1mm case that reads as casual rather than undersized. The navy tone maintains that tonal connection to the blue bezel while adding warmth and texture that steel and rubber can't replicate. It's the kind of strap that works equally well with a weekend shirt or a blazer with the sleeves rolled up.

Other Pueblo options worth exploring:

• Cognac Pueblo Slim — warm, earthy contrast that plays against the cool tones of the Batman bezel
• Olive Green Pueblo Slim — a field-watch vibe that leans into the GMT's tool-watch heritage

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The Wildcard — Navy Sailcloth Signature

This is where the Batman starts to feel like a genuinely different watch.

The Navy Sailcloth Signature Strap is made from FKM fluoroelastomer rubber molded with a sailcloth weave texture — so you get the nautical, technical aesthetic of traditional sailcloth without any of the drawbacks. No fraying, no water absorption, no break-in period. It's fully waterproof and sweat-resistant from day one, which makes it a genuine sport strap in every sense.

Why navy? Because the colour harmony with the Batman's bezel is exceptional. The navy rubber picks up the blue ceramic and extends it down the wrist, creating a visual continuity that makes the watch feel intentionally coordinated rather than just stuck on a strap. The Signature profile (4.5mm tapering to 2.2mm) adds substance to the 40mm case — there's enough visual weight to match the GMT-Master's proportions without overwhelming it. A calfskin padding inside ensures the strap holds its shape and moulds to your wrist over time.

So why the wildcard slot? Because the Signature profile is polarizing. At 4.5mm at the lug, it's the thickest strap in this lineup, and on a watch that's already 13.1mm thick, that extra volume is a deliberate style choice. Some people love the bold, padded look — it gives the Batman real wrist presence and a distinctly nautical character. Others prefer the sleeker proportions of a Slim or Stitchless profile. If you're in the first camp, this might be your favourite strap in the entire list.

Other sailcloth options for the Batman:

• Black — goes full stealth; the Batman disappears into the strap
• Grey — a cooler, more understated alternative to navy
• Olive Green — adds a military dimension; pairs surprisingly well with the dark bezel

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A Note on Buckle Colour

Match your buckle to your case — always. The 126710BLNR is Oystersteel, so you want a brushed silver or polished silver buckle. All Delugs leather and sailcloth straps offer a choice of buckle colour at checkout. For CTS rubber straps, the CTS Deployant Clasp in stainless steel is the natural match — it mirrors the Oyster bracelet's folding clasp feel and adds security during active wear.

How to Change the Strap on Your Rolex GMT-Master II

Swapping straps on the GMT-Master II is straightforward, but there's one important detail: the modern 126710BLNR does not have drilled-through lug holes. This is standard for current-production Rolex sport watches. You'll access the spring bars from the narrow gap between the strap and the inner lug surface.

All Delugs straps come with quick-release spring bars already pre-installed, which makes the process significantly easier — even without drilled lugs.

1. Prepare your workspace. Lay the watch face-down on a soft cloth or microfiber pad to protect the caseback and polished case surfaces from scratches.
2. Release the spring bar. Locate the small lever on the quick-release spring bar. Pull it back with your fingernail or fingertip to compress the bar.
3. Remove the strap. While holding the lever, angle the strap out from between the lugs. Repeat for the other side.
4. Insert the new strap. Slide one end of the spring bar into the lug hole. Pull the lever on the quick-release spring bar knob, guide the entire spring bar into the opposite lug hole, and then release the knob. You should hear a small click when the spring bar extends and seats into the lug hole.
5. Check the fit. Give the strap a gentle tug to make sure both spring bars are securely locked in. If there's any play, reseat the spring bar.

The entire process takes under a minute with quick-release spring bars — no spring bar tool required. The GMT-Master II uses a standard 20mm lug width, and all Delugs straps in 20mm will fit perfectly.

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Frequently Asked Questions

What lug width is the Rolex GMT-Master II Batman?

The Rolex GMT-Master II 126710BLNR has a 20mm lug width. This is the same as the Submariner, Explorer, and Datejust 36 — making it one of the most universally compatible sizes. Any aftermarket strap in 20mm will fit. Avoid 19mm or 21mm straps — the GMT-Master's tight tolerances mean anything off-spec will either leave visible gaps or be extremely difficult to install.

Can you put a rubber strap on a Rolex GMT-Master II?

Yes — and it's arguably the most natural strap choice for the GMT-Master II. The watch is a sport/travel tool at heart, and rubber matches that personality perfectly. The Navy CTS Rubber Strap is the top pick for the Batman specifically — the navy colour creates an exceptional tonal match with the blue bezel half. For a sportier option with vintage flair, the Black Tropical CTS Rubber adds a perforated texture inspired by classic dive straps. Note that CTS rubber straps made for specific watch models (like the Submariner or Speedmaster) are NOT compatible with the GMT-Master II — those have custom endlink profiles shaped for a different case.

What strap colours work best with the Batman bezel?

The blue and black Cerachrom bezel creates a specific colour palette. Navy straps are the standout choice — they pick up the blue half of the bezel and create a cohesive, tonal look. Black straps lean into the dark side and make the watch feel more stealthy and tactical. Grey works as a neutral bridge between the two bezel colours. Cool-toned leathers (taupe, grey-brown) are safer than warm tones. Avoid bright or warm colours that compete with the blue ceramic — the bezel is the focal point, and the strap should complement it, not fight it.

Does the GMT-Master II 126710BLNR have drilled lug holes?

No. The modern 126710BLNR does not have drilled-through lug holes. This is standard for all current-production Rolex references. Strap changes require accessing the spring bars from the gap between the strap and the inner lug surface. Quick-release spring bars (pre-installed on all Delugs straps) make this straightforward — no spring bar tool needed.

How do I remove the Oyster bracelet from my GMT-Master II?

The Oyster bracelet attaches via spring bars (not screws). Because the 126710BLNR has no drilled lug holes, you'll need to compress the spring bars from the narrow gap between the solid endlinks and the inner lug surface. The safest way to do this is with a Bracelet Removal Tool, which gives you the leverage and precision to compress the spring bar without slipping and scratching the polished case surfaces. Place a piece of tape over the inner lug surface as an extra precaution.

What's the best travel strap for the GMT-Master II?

The GMT-Master II was designed for frequent travellers, so the strap should keep up. For maximum practicality, the Navy CTS Rubber is waterproof, durable, and comfortable in any climate — plus the deployant clasp with micro-adjustment makes it easy to fine-tune the fit when your wrist swells on long flights. For something with more texture, the Sailcloth Signature splits the difference — sporty enough for activities but refined enough for dinner.

Can I use a strap made for a different watch on my GMT-Master II?

Only if it's a standard (non-model-specific) strap in 20mm. Straps designed for specific watch models — like a Submariner CTS Rubber or an Omega Speedmaster CTS Rubber — have custom endlink profiles shaped to match that particular case. Even if the lug width is the same, the fit won't be right on a different watch. Stick with standard 20mm straps, or look for straps specifically listed as compatible with the GMT-Master II.

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Finding Your Strap

The GMT-Master II Batman is a watch with real personality — that blue/black bezel is a conversation starter on its own. The straps that work best are the ones that channel that personality rather than working against it: navy to echo the blue, black to go stealth, cool neutrals to bridge the two. If you're starting out, the Navy CTS Rubber (#1) is the safest first purchase — it matches the watch's sporty DNA, it's practically indestructible, and the navy colour creates the best tonal harmony with the blue bezel. From there, add a Black Epsom Slim for everyday versatility and a Saffiano Stitchless for when you want something cleaner.

Use the Rolex GMT-Master Strap Finder to see every compatible strap in one place, filtered to your exact reference.

Not sure which strap is right for your specific Batman? Our team is available 24/7 via live chat — drop us a message and we'll help you find the perfect match for your watch, wrist size, and style.

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About Delugs

Founded in 2018 and headquartered in Singapore, Delugs is dedicated to elevating the experience of watch ownership through the simple yet powerful act of strap changing. We believe that straps are integral to how a timepiece is worn, perceived, and enjoyed. Our mission is to make strap changing a lifestyle — an everyday act of self-expression and versatility.

Delugs is an independent brand with a global community of clients, with a strong online presence and growing physical retail footprint. Our direct-to-consumer focus keeps us closely connected with the watch enthusiast community — fostering conversations, hosting events, and helping shape a more inclusive and expressive culture around watch collecting. We also work closely with watch brands to craft straps that complement their timepieces, bridging the gap between brand and collector, form and function.

Our catalogue spans leather, rubber, and fabric straps, with options for every watch and every occasion. We are committed to craftsmanship and quality, product design and innovation, and outstanding customer service. We offer watch owners the freedom to change straps as easily as changing outfits, and the opportunity to engage more deeply with the watches they love.

Visit our flagship boutique at Raffles Hotel, Singapore →

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— Marcus