I have an old Timex Ironman Triathlon model. I need a spare 18mm tape. I thought it would fit. Unfortunately, when I measured the bar, it was 20 mm. My old group was 18mm. The good news was I was able to cut the strap so it could fix my old watch. So if you get this and it doesn't fix it you can trim it off with a good pair of wire cutters.
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