The 116710BLNR is one of those modern Rolex references that people still talk about like it just came out yesterday. The nickname “Batman” stuck for a reason: that blue and black bezel is bold, but it’s not childish. It’s sporty without being loud, and it somehow makes the whole watch feel a bit more relaxed than a plain black GMT.
It’s also one of the easiest Rolex models to change the personality of with a strap. The case has presence, the bezel does the talking, and a good rubber strap can steer it from “daily beater GMT” to “clean and intentional” in about five seconds.
Strap sizing, the part you shouldn’t guess on
Your Batman is a 40mm GMT-Master II with a 20mm lug width. That 20mm is the number you need to keep in your head. If you’ve ever tried forcing the wrong lug width onto a Rolex case, you already know it ends with frustration, scratched lugs, or both.
On Helvetus product pages, the practical move is simple: select the “GMT-Master II” option. That’s it. No extra math, no weird compatibility rabbit holes. Pick your color, choose the buckle style you prefer, and you’re sorted.
And if you’re the type who likes to rotate straps, you’ll like that the GMT-Master II straps are available in both deployant and pin buckle versions, plus a wider range of colors than just the obvious black. Everything sits in the same collection, so you’re not hunting around.
The strap choices that work best on the 116710BLNR
If you want the Batman to feel like… well, the Batman, the Black/Blue LuxLine® is the one I’d put at the top of the list. It looks purposeful because it mirrors the bezel theme without copying it. That little blue line is enough to pick up the bezel’s blue section, especially in daylight, and it gives the watch a sharper, more “designed” look than a plain strap. This is the strap I’d wear when I want the watch to look sporty, but still put together.
Black/Blue LuxLine® Strap for GMT Master II
Then there’s Black, which is the safest choice and, honestly, still one of the best. It tones the watch down and makes the bezel pop harder. The whole thing becomes cleaner, stealthier, and a bit more serious. If you wear the Batman as a daily watch and don’t want the strap to compete with the bezel, black rubber is the easy win.
Black Rubber Strap for GMT Master II
The wildcard is Blue, and it works better than people expect. On paper it sounds like too much, but on wrist it can feel surprisingly balanced because the bezel already has that blue presence. The blue strap leans into the playful side of the Batman nickname, but it still feels “watch guy”, not novelty. I like it most in summer, with casual clothes, or when you want the GMT to feel less corporate.
Blue GMT Master II Rubber Band
If you want to see all colors and both buckle options in one place, this is the collection page to use:
All GMT Master II Rubber Straps
Buying the right strap from Helvetus without making it complicated
The biggest mistake I see people make with Rolex straps is buying something that technically fits, but looks slightly “off” at the case. A GMT-Master II deserves better than that.
With Helvetus, the GMT straps are designed specifically around the GMT-Master II case shape, so the fit looks intentional instead of improvised. When you’re on a product page, you just select GMT-Master II, then decide whether you want deployant or pin buckle, and you’re done. If you’re planning to pick up more than one strap over time, the GMT-Master II collection page makes it easy to compare colors without risking the wrong selection.
A quick closing note, because the details matter
The 116710BLNR is already a classic modern Rolex. A good rubber strap doesn’t “upgrade” it so much as it makes it feel more yours, and it’s the kind of change you notice every time you look down at your wrist. Helvetus keeps it simple: straps designed for a precise fit on this specific GMT-Master II, backed by a lifetime warranty, with free worldwide shipping and no import costs added on top. And when a brand has already been trusted by 30,000+ customers worldwide, it takes a lot of the risk out of buying a strap online, especially for a watch people care about as much as the Batman.
