Rolex
Day-Date 36 118138-0136— lug 20mm
Rolex Day-Date 36 118138-0136: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Rolex 118138-0136The essential strap measurement.
Browse 20mm straps →118138-0136
Rolex caliber 3155 Hours, Minutes, Seconds | Date, Day | Chronometer
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Day-Date 36
FAQ
What is the exact lug width of the Rolex Day-Date 36 118138-0136?
The lug width of the Rolex Day-Date 36 118138-0136 is 20 millimetres. This is the distance between the two lug pins that connect the case to the strap. The 20mm measurement represents the classic standard for men's formal watches, providing you with access to a wide selection of artisanal straps without compatibility constraints.
What is the best strap for a yellow gold Rolex Day-Date 36?
For the 118138-0136 in 18k yellow gold, we recommend a strap in alligator leather with vegetable tanning and natural grain texture. This choice dialogues with the finely controlled lustre of the gold case, whilst the leather develops a beautiful patina in parallel, creating visual harmony that matures over years. Alternatively, burgundy shell cordovan or French calf with hand-sewn silk stitching offer elegance and sartorial versatility.
How do I change the strap on my Rolex Day-Date 36 118138-0136?
To change the strap, you will need a spring bar tool or specialist watchmaker assistance. Position the watch securely, locate the two lateral lug pins beneath the case, and apply gentle vertical pressure to withdraw them from the attachment holes. Then insert the pins into your new strap following the reverse procedure. If you opt for a deployante clasp, this facilitates daily adjustment without requiring tools.
Are aftermarket straps compatible with the 118138-0136?
Yes, any strap with a 20mm lug width is compatible with the Day-Date 36 118138-0136. Artisanal straps produced by Casati Milano for this measurement guarantee construction quality equivalent to Rolex standards. We recommend verifying the clasp type: the 118138-0136 uses fixed pins (not flanged pins), so ensure your new strap supports this configuration.
How long does a leather strap last on a Rolex Day-Date 36?
Durability depends on the leather type and daily wear. An alligator strap with vegetable tanning typically lasts 4–6 years under regular use, whilst shell cordovan, being more robust, can last 6–8 years. Calf leather is more delicate, with an estimated lifespan of 3–4 years. With proper care – avoiding excessive moisture and storing the watch in a dry environment – you can extend the usable life considerably. Casati Milano offers an 18-month warranty against manufacturing defects.
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 →By appointment only · Milan
The atelier's website: casatimilano.com