The Rolex Explorer II ref. 16570 is the “just right” Explorer II. Before the jump to 42mm, this was the everyday sweet spot: slim enough to disappear under a cuff, still rugged enough to feel like a proper tool watch, and with that GMT hand reminding you the model was never meant to be delicate.
It also has something the newer references don’t quite replicate: a slightly lighter, faster feel on the wrist. The watch wears like it’s ready to go, not like it’s trying to make a statement. That’s why it’s such a fun strap watch. You can nudge the personality without overwhelming the proportions.
Fit matters on the 16570 (and it’s an easy win)
The Explorer II 16570 is a 40mm case with a 20mm lug width. Straightforward, but don’t get complacent, because the only way to ruin the experience is ordering the wrong width.
If you’re buying from Helvetus, here’s the practical part people skip and then regret: on the product page, select the 20mm option. That’s the correct fit for the 16570. If you accidentally choose 21mm or 22mm, you’re not “close.” You’re wrong. And if you choose 19mm, you’ll get gaps that make the watch look oddly unfinished, like the strap is apologizing for being there.
So yes, the whole fit guide is basically one sentence:
Explorer II 16570 equals 40mm case and 20mm lugs, and you should choose 20mm on the Helvetus product page.
Strap picks that actually make sense on this reference
Because the 16570 isn’t oversized, straps feel more “styling” than “re-engineering.” You can go bold without the watch looking cartoonish, and you can go clean without it becoming bland.
Black/White LuxLine® is the one that feels made for the Explorer II’s vibe. The 16570 already lives in that world of crisp contrast, especially if you’re wearing the Polar dial. A black strap keeps the tool-watch backbone intact, and the white LuxLine® detail mirrors the dial accents in a way that looks deliberate, not decorative. It’s sporty, but it’s also tidy enough to wear with something smarter without feeling like you’re forcing a “look.”
Black/White LuxLine®: Strap for Rolex Explorer II Black/White
If you want the most natural match for the Polar 16570, white is surprisingly addictive. It turns the watch into this clean, modern thing without stealing the Rolex identity. The steel case and fixed bezel keep it grounded, so the strap doesn’t come off as loud, it comes off as fresh. I also like white on the black dial 16570 when you want that high-contrast “summer watch” feel. It’s a left-field combo that looks better than it has any right to.
White strap: Strap for Rolex Explorer II White
Then there’s orange, which is pure fun on the Explorer II, and the 16570 can carry it easily because the case isn’t trying to be huge. Orange works best when you want to lean into the model’s adventurous side, especially if your Explorer II has the classic orange GMT hand. It’s the strap for weekends, travel days, and anything outdoors, the times when the Explorer II feels most honest. And on a 40mm case, orange feels punchy rather than overpowering.
Orange strap: Stap for Rolex Explorer II Orange
Getting the right strap from Helvetus, without the overthinking spiral
The Explorer II is one of those Rolex models where fit is everything. When the strap is shaped correctly for the case, the watch looks balanced and “meant to be” on rubber. That’s the goal. Not novelty, not cosplay, just a strap that sits right and wears comfortably.
If you want to see more than these three colors, the easiest route is the Explorer II collection page: All Strap for Rolex Explorer II
Helvetus offers a variety of colors, and the straps come in both deployant and pin buckle versions, so you can choose what feels better on your wrist day-to-day. Some people love the secure, finished feel of a deployant. Others prefer the simplicity of a pin buckle, especially if they adjust fit a lot.
Just keep the one rule in mind for this reference: on the product page, choose 20mm.
Final thought
A Rolex Explorer II 16570 is already a collector’s favorite, but it’s also a genuinely wearable watch, which is why straps make so much sense here. You can sharpen the look with a LuxLine® detail, go ultra-clean with white, or add a bit of attitude with orange, and the watch still feels like the same honest Explorer II at heart.
And if you’re picking your strap from Helvetus, the experience is refreshingly straightforward: you’re getting something designed for a precise fit for the Rolex Explorer II 16570, backed by a lifetime warranty, with free worldwide shipping and no import costs. With 30,000+ customers worldwide already trusting the brand, it’s an easy decision as long as you don’t trip at the finish line. Select 20mm, and you’re set.
