Rolex
Explorer II 216570-0001— lug 21mm

The lug width of the Rolex Explorer II 216570-0001 is 21mm. This specific measurement ensures balanced visual proportions on the 42mm case. To verify accuracy, use a digital calliper to measure the internal distance between the two lugs: the result must fall between 20.8 and 21.2mm. Precise measurement is essential to avoid incompatibility when selecting aftermarket straps.

For the 216570-0001, we recommend fine leather straps: natural alligator (warm brown colour that evolves over time), calf leather in vegetable tanning (noble ageing with evolving patina), or shell cordovan (extraordinary durability and intrinsic lustre). If you prefer a purely instrumental vocation, a Cordura NATO or vulcanised rubber strap maintains the sport profile without distraction. Ideal colour pairings are warm browns (cognac, tobacco), dark blue, English green, and grey talpa; we advise against flat black.

Changing a Rolex Explorer II strap requires specific tools: a spring bar tool and a stable work surface. Position the watch with the case facing upward, insert the spring bar tool tip into the lug hole to release the internal spring, extract the strap completely, then insert the new strap ensuring the spring clicks correctly into both lugs. If unfamiliar with this procedure, entrust the work to a professional watchmaker to avoid scratching the case.

Yes, 21mm aftermarket straps are compatible with the 216570-0001, provided they are crafted by artisans respecting construction tolerances. The spring must fit the exact measurement (20.8–21.2mm) to prevent excessive play at the lugs. Lower-quality straps may present irritating oscillation or damage the lugs over time. We recommend choosing specialist manufacturers providing production defect warranties and ideally offering post-purchase support.

The lifespan of a natural leather strap varies depending on material and usage: quality alligator resists 3–5 years with moderate wear, maintaining elasticity; vegetable-tanned calf 2–4 years with fascinating ageing; shell cordovan 4–7 years thanks to fibre density. Exposure to humidity, perspiration, and UV rays accelerates ageing. Vulcanised rubber straps maintain performance for 5–8 years without aesthetic degradation. Casati Milano provides an 18-month warranty on manufacturing defects.