Milano Straps
← Zenith

ITENDEFRES

SearchCart
Menu

Zenith · Defy Extreme

Strap for Defy Extreme E Second Edition

Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

23mm
23 mm strapsAll Zenith
Lug width23 mm
Case diameter45 mm
Reference10.9101.9004/60.I310
FamilyDefy Extreme
MovementZenith caliber El Primero 9004 hours, minutes, small seconds | Chronograph | chronometer, power reserve indicator
Year2023
CaseSapphire | Titanium, Forged Carbon

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

View →

The Defy Extreme 10.9101.9004/60.I310, seen from the bench

The Zenith Defy Extreme 10.9101.9004/60.I310 is a 45mm chronograph featuring the El Primero 9004 movement with a 36,000 vibrations per hour escapement and column-wheel chronography. The case combines titanium and forged carbon materials, with a sapphire crystal and anti-reflective treatment. The 23mm lug width accommodates the watch's robust proportions while maintaining refined proportionality, making it part of the Defy collection's innovative approach to haute horlogerie design.

Frequently asked questions

What lug width does the Zenith Defy Extreme 10.9101.9004/60.I310 feature?

The Zenith Defy Extreme 10.9101.9004/60.I310 is fitted with a 23mm lug width. This specification is exclusive to this model and maintains visual proportionality across the 45mm case diameter. Always verify measurements by placing a calliper at the base of the lugs, where the strap contacts the case.

Which strap material best suits the Defy Extreme 10.9101.9004/60.I310?

The Defy Extreme performs optimally with vegetable-tanned alligator (cognac or anthracite grey), shell cordovan for pronounced chromatic character, or hand-finished calf for daily wear elegance. Selection depends on intended use: formal/occasional application suggests alligator or shell cordovan; everyday wear favours calf. Vulcanised rubber straps with titanium deployante clasps preserve the sports character whilst reducing perceived weight.

How do I change the strap on the Zenith Defy Extreme 10.9101.9004/60.I310?

Strap replacement requires removal of the lugs using a spring bar remover tool. Position the watch on a stable surface, locate the minute slot at the base of each lug, insert the tool's blade gently to compress the internal spring, and slide the lug outward. Repeat on the opposite side. Insert replacement lugs by aligning the pins with the strap slots and push until the locking click is felt.

Is a 23mm aftermarket strap compatible with the Defy Extreme 10.9101.9004/60.I310?

Yes. Any strap featuring a 23mm lug width is compatible with the Defy Extreme 10.9101.9004/60.I310, regardless of manufacturer origin. Milano Straps provides a curated selection of 23mm straps with customisation options and bespoke creation through Atelier Casati Milano, including complimentary technical consultation via email to validate proportionality against your wrist.

What is the expected lifespan of a leather strap on the Zenith Defy Extreme 10.9101.9004/60.I310?

Durability varies according to material specification and usage pattern. Vegetable-tanned alligator subjected to daily wear maintains functionality for 4-5 years before requiring replacement; shell cordovan resists degradation for 5-7 years owing to superior leather density. Hand-finished calf offers 3-4 years under intensive use. Seasonal rotation employing multiple straps significantly extends overall lifespan. Milano Straps guarantees 18 months on all bespoke straps regardless of natural wear.

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