Strap for Aquaracer 300M Quartz 35 Stainless Steel / Black / Bracelet

The lug width of the TAG Heuer Aquaracer WAY131A.BA0913 is exactly 20 mm. This is a rigid, non-negotiable measurement: the strap must fit perfectly between the suspension pins with maximum tolerance of ±0.2 mm. To verify the measurement, place a ruler on the inside of the upper pins of the case, parallel to the dial.

Choice depends on usage and aesthetic context. For formal occasions we recommend polished black alligator or black calf leather with natural patina. To maintain the original sporting character, FKM rubber or grey/blue canvas NATO are optimal. Navy blue in shell cordovan represents a noble compromise between formality and the Aquaracer collection's maritime vocation. The important thing is to choose artisanal materials capable of aging with dignity.

The change requires a specialised tool: the spring bar tool. Position the watch on a stable surface with the case facing downward. Insert the thin blade of the spring bar tool into the shallow groove next to the upper pin, applying gentle lateral pressure to release the internal spring. Extract the pin completely, remove the old strap, insert the new one aligning it to the holes and reinsert the pin until it clicks into place. If you are unfamiliar with the procedure, the Casati Milano atelier performs the change by appointment.

Yes, provided the lug width is exactly 20 mm. Any quality 20 mm strap will fit the WAY131A.BA0913 perfectly. Milanostraps.it offers a selection of 20 mm compatible straps in various materials (alligator, calf, rubber, NATO) with fast shipping. For a completely personalised strap, the Casati Milano atelier creates bespoke designs with personal choice of leathers and 18-month warranty.

Durability depends on leather quality, frequency of use and care. An artisanal alligator or shell cordovan strap, worn daily, maintains structural integrity for 4-6 years before requiring regeneration or replacement. Calf leather, being softer, typically lasts 3-5 years. FKM rubber has indefinite durability but may lose elasticity after 8-10 years. Proper maintenance (avoiding stagnant water, drying after humid exposure, applying nourishing balms every 6-12 months) significantly extends strap life.