Strap for Aquaracer 300M Calibre 5 40.5 Stainless Steel / Black / Bracelet

The lug width of the WAY2110.BA0910 is 20mm. This measurement represents the distance between the two lugs (horns) of the case where the strap is inserted. It is a critical specification to ensure compatibility with any aftermarket strap, which must be manufactured at a maximum width of 20mm to fit correctly in the case lugs without mechanical play.

The ideal strap depends on your intended use. For swimming and diving, we recommend vegetable-tanned alligator leather with a thickness of 3.5–4mm, offering resistance to seawater and natural patina development over time. For daily versatility, vegetable-tanned calf leather in cognac or tobacco hues maintains the sporty profile. For absolute lightness, a navy blue cotton NATO strap is practical and reversible. All straps must have a 20mm lug width for guaranteed compatibility with the WAY2110.BA0910.

The WAY2110.BA0910 is equipped with fixed lugs (not quick-release pins). To change the strap: 1) use a spring bar removal tool or a small flat screwdriver; 2) place the watch on a soft surface to prevent scratches; 3) insert the tool into the lug recess on one or both sides to lift the spring bar (or pin) and slide it out of the lug; 4) insert the new strap, aligning it correctly before reinserting the spring bar. We recommend professional assistance for the first change.

Yes, you can use artisan-made or third-party straps provided they comply with the 20mm lug width specification and a maximum thickness of approximately 3.5–4mm. Reputable manufacturers provide compatibility certifications. We recommend straps with vegetable tanning or shell cordovan leather, which age beautifully with sweat and saltwater exposure compared to conventional chromium-tanned leathers. Milano Straps offers a range of customisable 20mm straps.

A high-quality vegetable-tanned leather strap, with proper maintenance, lasts 3–5 years of daily wear before requiring replacement due to natural wear. Durability increases if the watch is not exposed to frequent immersion and is carefully dried after saltwater contact. Chromium-tanned leathers last less (18–30 months) because they degrade rapidly in humid and salty conditions. A shell cordovan strap can last 7–10 years if protected by a fibula with a gasket and not regularly submerged.