Zenith · Defy Extreme
Strap for Zenith Defy Extreme 10.9100.9004-2/24.I301
The Defy Extreme Carbon Energy X Prix takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
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- 12-month warranty on manufacturing defects
- Hand-stitched in Milan
Lug width

What length do I need?
Measure your wrist with a tailor's tape or a piece of string, comfortably snug.
| Wrist circumference | Length (long side / short side) |
|---|---|
| 15.0–16.4 cm | 120 / 70 mm |
| 16.5–17.8 cm | 125 / 75 mm |
| 17.9–19.0 cm | 130 / 80 mm |
| 19.1–20.3 cm | 135 / 85 mm |
| 20.4–21.6 cm | 140 / 85 mm |
| 21.7–22.9 cm | 145 / 90 mm |
The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.
What I'm asked about the Zenith Defy Extreme 10.9100.9004-2/24.I301
What strap size does the Zenith Defy Extreme 10.9100.9004-2/24.I301 take?
The Zenith Defy Extreme 10.9100.9004-2/24.I301 needs 23 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the Zenith Defy Extreme 10.9100.9004-2/24.I301 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Zenith Defy Extreme 10.9100.9004-2/24.I301?
Yes, in 23 mm leather. On a 45 mm case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the Zenith Defy Extreme 10.9100.9004-2/24.I301?
A 23 mm calf strap, for every day. I don't keep this size ready in the catalogue: I make it to measure. If you'd rather have something built on your wrist, the Casati atelier.
More Defy Extreme
All Defy Extreme → Zenith families →
Every Defy Extreme reference with its measured lug width, on watchbands.ai →
More Zenith in 23 mm
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- Defy El Primero 21 Full Carbon / Skeleton / RubberDefy
For changing the strap
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
The atelier's website: casatimilano.com
