TAG Heuer Formula 1

Most TAG Heuer Formula 1 references take a 20 mm watch strap: 197 of 254. The lug width follows the case size: 37 mm case → 20 mm, 41 mm case → 20 mm, 43 mm case → 20 mm and 44 mm case → 20 mm.

Shop 18 mm Shop 20 mm Shop 21 mm Shop 22 mm

TAG Heuer Formula 1 lug width by case size

254 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
35 mm	18 mm · 20 mm on 7	17	—	WA121F.BA0023, WA121J.BT0012, WA121L.BT0014
37 mm	20 mm	30	—	CAC1310.BA0852, CAC1311.BA0852, WAC1214.BA0852
38 mm	19 mm	9	—	WBY1111.BA0042, WBY1112.BA0042, WBY1113.BA0042
40 mm	20 mm	1	—	CAC111B.BA0850
41 mm	20 mm · 16 mm on 1	48	—	CA1210.BA0493, CA1211.BA0493, CA1212.BA0493
42 mm	20 mm	27	—	CAU1110.BA0858, CAU1110.FT6024, CAU1111.BA0858
43 mm	20 mm · 22 mm on 23 · 21.5 mm on 4 · 18 mm on 2 · 21 mm on 2	76	—	CAZ1011.BA0842, CAZ1014.FC8196, CAZ1018.BA0842
44 mm	20 mm · 18 mm on 2 · 22 mm on 2	43	—	CAH1010.BA0860, CAH1010.FT6026, CAH1011.BA0854
not recorded	14 mm · 20 mm on 1 · 21.5 mm on 1	3	—	371-508

References that take a different watch strap

WBJ1311.BA0666: 20 mm, not the 18 mm of most 35 mm cases
WBJ1311.FC8237: 20 mm, not the 18 mm of most 35 mm cases
WBJ1312.FC8231: 20 mm, not the 18 mm of most 35 mm cases
WBJ1315.BA0666: 20 mm, not the 18 mm of most 35 mm cases
WBJ1316.BA0666: 20 mm, not the 18 mm of most 35 mm cases
WBJ1317.FC8230: 20 mm, not the 18 mm of most 35 mm cases
WBJ1318.BA0666: 20 mm, not the 18 mm of most 35 mm cases
WAZ1110.BA0875: 16 mm, not the 20 mm of most 41 mm cases
CAZ1010.FT8024: 21.5 mm, not the 20 mm of most 43 mm cases
CAZ1012.BA0883: 22 mm, not the 20 mm of most 43 mm cases
CAZ1013.BA0883: 22 mm, not the 20 mm of most 43 mm cases
CAZ1014.BA0842: 22 mm, not the 20 mm of most 43 mm cases
CAZ1014.FT8028: 22 mm, not the 20 mm of most 43 mm cases
CAZ1015.BA0883: 22 mm, not the 20 mm of most 43 mm cases
CAZ1017.BA0842: 22 mm, not the 20 mm of most 43 mm cases
CAZ101A.BA0842: 22 mm, not the 20 mm of most 43 mm cases
CAZ101AC.BA0842: 22 mm, not the 20 mm of most 43 mm cases
CAZ101AD.FT8024: 22 mm, not the 20 mm of most 43 mm cases
CAZ101AH.BA0842: 22 mm, not the 20 mm of most 43 mm cases
CAZ101AJ.FC6487: 22 mm, not the 20 mm of most 43 mm cases
CAZ101AK.BA0842: 22 mm, not the 20 mm of most 43 mm cases
CAZ101AL.BA0842: 21 mm, not the 20 mm of most 43 mm cases
CAZ101AP.BA0842: 21.5 mm, not the 20 mm of most 43 mm cases
CAZ101AT.BA0842: 21 mm, not the 20 mm of most 43 mm cases

And 21 more in the full list below.

Questions about the TAG Heuer Formula 1

Can two TAG Heuer Formula 1 watches with a 43 mm case take different watch straps?

Yes. Of the 76 TAG Heuer Formula 1 references with a 43 mm case, 45 take 20 mm, 23 take 22 mm and 4 take 21.5 mm. The reference number decides, not the case size alone.