TAG Heuer
Carrera CBK2113.BA0715— lug 20mm

The lug width of the TAG Heuer Carrera CBK2113.BA0715 is 20mm. This measurement refers to the internal distance between the two case lugs where the strap is attached. To verify this dimension, place the watch flat and measure with a digital calliper from the inner edge of one lug to the inner edge of the other, moving parallel to the dial. This proportion has been calibrated on the 41mm case to maintain the dimensional balance characteristic of the Carrera line.

The best strap choice depends on your usage style and aesthetic preferences. For formal elegance, we recommend an alligator strap in teak brown tones: the regular scales create refined visual texture and the leather develops deeper patina over time. For more intense sporty use, calf leather with vegetable tanning offers robustness and controlled ageing, whilst shell cordovan represents the choice for those seeking exceptional durability and mirror-like patina. Vulcanised rubber straps are ideal for water-based activities and humid environments.

Changing the strap on the CBK2113.BA0715 is accomplished by removing the spring bars – small metal pins that connect the strap to the case lugs. Use a spring bar tool (a specialised implement resembling a small screwdriver with a bifurcated end) to gently press the internal locking mechanism of the pin, thereby releasing the strap. Position the new strap inside the lugs and reinsert the pins until you hear a click. If you are not confident with this procedure, the Casati Milano atelier offers on-site assistance at their location by appointment.

All straps with a 20mm lug width are compatible with the CBK2113.BA0715. The main categories include: natural alligator leather straps, calf leather with vegetable tanning, shell cordovan, ostrich leather, vulcanised rubber straps, NATO-style nylon woven straps, and steel straps fitted with deployment clasps. Always verify that the strap has the correct lug width and that the spring bars possess the standard diameter compatible with the case lugs (typically 18-20mm in length).

The lifespan of a leather strap depends on the material, tanning method and level of daily use. An alligator or vegetable-tanned calf strap, worn daily, maintains structural integrity for 3-5 years before requiring replacement. Shell cordovan, thanks to superior fibre density, can extend to 7-8 years. Constant exposure to humidity, perspiration and UV rays accelerates ageing. Regular maintenance – cleaning with a soft cloth and annual hydration using specific balms – significantly extends longevity. Rubber straps, by contrast, maintain functionality for 5-7 years before showing aesthetic degradation.