Tudor
Classic 21010-0010 (aka: M21010-0010)— lug 20mm

The lug width of the Tudor Classic 21010-0010 is 20 millimetres. This measurement is consistent across all dial and case material variants of the model. To verify accuracy, measure with a digital calliper the space between the two lugs at the attachment point: it must be exactly 20mm.

For the Tudor Classic 21010-0010, we recommend genuine alligator with vegetable tanning (chocolate brown or cognac) for lasting elegance, or Italian calf leather with fine grain if you seek a material that develops patina over time. For daily sports use, a cordura NATO strap is practical and authentic. Structured rubber remains the ideal option for humid or summer environments.

The strap is secured to the lugs via pins or spring bars. Use a dedicated tool (spring bar tool) to gently compress the internal spring of the bar and slide the pin out of the housing. Remove the old strap, verify that the pins are intact, then insert the new one aligning it perfectly with the lugs. Do not force: if the pin does not enter smoothly, check the alignment.

Yes, any high-quality certified strap with a 20mm lug width is compatible. Ensure that the strap thickness respects visual proportions (approximately 4-5mm for thin leathers, maximum 6mm for robust leathers). The pins must be of identical diameter. We recommend Italian artisanal straps to guarantee construction quality and longevity.

A high-quality natural leather strap (alligator, calf, shell cordovan) typically lasts 3 to 5 years with average daily use, and up to 7 to 10 years with proper care and rotation. Durability depends on ambient humidity, direct sun exposure, and cleaning frequency. Light maintenance (cleaning every 3 months, conditioning every 6 months) significantly extends the strap's lifespan.