Strap for Formula 1 Quartz 43 Stainless Steel / Bundesliga

The TAG Heuer Formula 1 WAZ1013.BC0900 features a lug width of 20 millimetres. This width is the standard specification for sports watches with a case diameter around 43 millimetres, allowing artisanal straps to be mounted without affecting visual proportions. Verification is straightforward: measure the distance between the spring bar holes (the metallic axes connecting the case to the lugs).

For the WAZ1013.BC0900, we recommend alligator leather for formal elegance compatible with its sporty character; shell cordovan for exceptional durability and developing patina; or vegetable-tanned calf leather for those desiring leather that ages with visual stratification. Rubber straps remain the most coherent option if the intent is to emphasise the chronometric heritage. The 20mm format adapts perfectly to every artisanal material.

The WAZ1013.BC0900 utilises standard lugs with removable spring bars. Proceed as follows: using a thin tool (spring bar tool), push one spring bar from one side to release the original strap; repeat from the other side. Insert the new strap into the lugs and reinsert the spring bars until they reach their natural position. If the strap features a deployant clasp, position it on the underside of the case to ensure symmetrical closure.

No. The TAG Heuer Formula 1 WAZ1013.BC0900 is calibrated exclusively for straps with a 20-millimetre lug width. The lugs of the case have fixed spaces that accommodate only spring bars of this width; narrower straps would leave unacceptable gaps, whilst wider straps would not insert. Always verify the reference before purchase.

A quality artisanal leather strap (alligator, cordovan, or vegetable-tanned calf) has an average lifespan of 5–7 years with daily use, extendable to 10–12 years with regular maintenance and rotation with alternative straps. Natural or FKM rubber resists wear longer but tends to harden after 6–8 years. The wear on the spring bars typically exceeds that of the leather: the stainless steel bars on your Formula 1 remain functional almost indefinitely if kept clean. Casati Milano offers an 18-month warranty on any bespoke strap.