Grey CTS FKM Rubber Strap for Longines Hydroconquest
Product Properties
Tired of the heavy bracelet on your Hydroconquest? Switch to a JU-designed CTS FKM rubber strap for a lighter, more stylish, and comfortable experience. Our straps feature an all-new, exclusive texture and can be cut to your ideal length for a precise, custom fit. Crafted from premium FKM rubber, they’re waterproof, odor-proof, and perfect for daily wear.
Available in 4 colors and compatible with either the original Longines deployant clasp or JU’s upgraded deployant clasp. While both options are functional, we recommend our upgraded version, which has been structurally optimized based on real user feedback, allowing the clasp to sit comfortably at the center of your wrist without causing pressure or discomfort.
Wrist Size Recommendations:
Original Clasp: Suitable for wrist sizes 16.5cm – 22cm
JU Upgraded Clasp: Suitable for 13.5cm – 21.5cm
If your wrist fits both, we recommend the upgraded clasp for improved comfort and better overall wearing experience.
Note： Not compatible with the Longines HydroConquest GMT model. This strap is designed only for the standard HydroConquest models.
Specification
Thickness: 3.7-6.2mm
Buckle Type: Deployant Clasp
Spring Bar Type: Standard Spring Bar
What Watches Does This Fit?
Our Hydroconquest rubber straps come in different lug widths to match specific case sizes. Use the chart below to choose the right fit for your watch.
| Lug Width | Fits Case Diameter | Common Models |
|---|---|---|
| 19mm | 39mm | e.g. L3.780.4.56.6, L3.780.4.96.9 |
| 21mm | 41mm / 43mm | e.g. L3.742.4.96.6, L3.782.4.56.6 |
| 22mm | 44mm | e.g. L3.841.4.56.6 and similar |
Not sure which size you need?
Feel free to contact us—we’ll help you find the perfect fit for your watch.
Made to Fit the Hydroconquest
Our rubber strap is designed to fit the HydroConquest case perfectly, the strap hugs the watch and your wrist. No gaps, no awkward fit—just a smooth, integrated look that feels like an original part of the watch.
Redesigned for Better Comfort
Upgrade Deployant Clasp
Our upgraded butterfly clasp offers a more balanced fit, improved comfort, and a cleaner look. Its compact, symmetrical design helps keep the clasp centered on your wrist and reduces pressure points—especially ideal for smaller wrists. Even for larger wrists, we recommend this clasp for its superior wearability and aesthetics.
Durable. Comfortable. Unique.
FKM Rubber in Modern Texture
We chose FKM rubber for its durability and comfort—it resists water, sweat, and odor with ease. To make it truly ours, we gave it a clean, modern texture that adds subtle character without taking attention away from your watch.
A custom fit, down to the millimeter
Cut to Fit Your Wrist
Everyone’s wrist is a little different—so we made the strap easy to trim for a fit that’s just right. No guesswork, no extra length flapping around—just a clean, comfortable feel tailored to you.
Micro-Adjustable on Clasp
The clasp includes built-in micro-adjustment, letting you fine-tune the fit whenever you need to—perfect for those warmer days when your wrist naturally expands a bit.
Thoughtfully Curated Premium Packaging
Every strap comes in a luxurious presentation box—complete with a spring bar tool, spare spring bars, microfiber cloth, wrist sizing ruler, and care card. It's not just packaging, it’s an experience—designed for collectors, connoisseurs, and anyone who values the details.
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