TAG Heuer · Formula 1
Strap for Formula 1 Alarm 41 Stainless Steel / Black / Bracelet
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Formula 1 WAH111C.BA0850 (aka: WAH111CBA0850, WAH111C)
Selected for the 20 mm lug width · workshop selection
Grey Hammered Leather Strap with Ecru Stitching€98
Hammered Calfskin Strap Light Blue€98
Hammered Calfskin Watch Strap Green with Ecru Stitching€98
Red Suede Strap with Stitching — Milano Straps€90
Dark Brown Calfskin Military Strap€80
The Formula 1 WAH111C.BA0850 (aka: WAH111CBA0850, WAH111C), seen from the bench
Frequently asked questions
What is the lug width of the TAG Heuer Formula 1 WAH111C.BA0850?
The lug width (ansa width) of the TAG Heuer Formula 1 WAH111C.BA0850 is 20 mm. This measurement represents the distance between the two attachment points (lugs) on the case. It is essential to verify this dimension before purchasing an aftermarket strap to ensure perfect compatibility.
Which strap is best suited for the TAG Heuer Formula 1 WAH111C.BA0850?
The ideal strap depends on your lifestyle. For uncompromising elegance, vegetable-tanned alligator offers natural texture and noble ageing. For daily practicality, brushed calf combines comfort and durability. For pure sportiness, cotton or FKM rubber NATO straps maintain the original design's authenticity. Milano Straps offers all these options with full customisation.
How do I change the strap on the TAG Heuer Formula 1 WAH111C.BA0850?
The TAG Heuer Formula 1 WAH111C.BA0850 uses a rotating bezel system (deployante). To change: (1) hold the watch with the caseback facing up, (2) locate the pins in the bracelet, (3) using a dedicated two-pronged tool, remove the pin from the inside of the bracelet, (4) remove the old bracelet and insert the new one by aligning the pins. If unsure, contact the Casati Milano atelier for professional installation.
Is an aftermarket strap for the WAH111C.BA0850 compatible with the original watch?
Yes, provided the strap is specifically manufactured for 20 mm lug width and the pins are the same diameter (typically 1.8 mm for this model). Milano Straps guarantees full compatibility with all technical specifications of the TAG Heuer Formula 1. Always verify dimensional tolerances with your retailer before purchase.
What is the average lifespan of a leather strap for the WAH111C.BA0850?
A quality leather strap (alligator, vegetable-tanned calf, shell cordovan) lasts an average of 4–6 years with daily use and ordinary maintenance. Natural ageing (patina) is desirable and part of the artisanal charm. Milano Straps straps carry an 18-month warranty against manufacturing defects. Longevity depends on UV exposure, moisture and frequency of use.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
