Rolex
Day-Date 36 118235f-0109— lug 20mm

The lug width of the Rolex Day-Date 36 118235f-0109 is precisely 20 millimetres. This measurement is taken from the tip of the left lug to the tip of the right lug, perpendicular to the dial plane. It is critical to verify this dimension before purchasing an aftermarket strap, as an incorrect width will result in poor fit and potential stress on the lugs.

For the Day-Date 36 118235f-0109 in rose gold, we recommend vegetable-tanned alligator, Horween shell cordovan, or European calf leather. Alligator offers uniform scales that mirror the character of the case; shell cordovan develops an almost ceramic sheen; European calf provides suppleness that elegantly contrasts the weight of rose gold. Avoid synthetic leathers, which fail to dialogue chromatically with rose gold.

Changing the strap on a Day-Date 36 requires a quality watchmaking spring bar tool. Position the watch on a soft cloth to prevent scratching, insert the flat tip of the tool under the spring bar maintaining downward tension, and slide the strap from the buckle toward the exterior. For Rolex straps equipped with Oyster or deployant clasps, the procedure is identical. If uncertain, consult an authorised Rolex retailer.

Yes, a 20-millimetre strap manufactured to standard watchmaking specifications is compatible with the 118235f-0109, provided the strap's internal lug width is exactly 20 millimetres and the strap terminus (whether standard spring bar or deployant) aligns with the case's buckle type. Artisanal leather straps of premium quality often provide greater aesthetic flexibility than original Rolex straps.

A high-quality leather strap (alligator, shell cordovan, or European calf in vegetable tanning) typically lasts 4–6 years with daily wear, provided regular maintenance: avoid prolonged moisture, abrasive grime, and forced creasing. Vegetable-tanned leather develops pleasant patina but accumulates debris in pores; cleaning every 6–8 weeks with a damp cloth and neutral soap significantly extends service life. Humid or perspiration-prone environments may reduce durability to 2–3 years without proper care.