Strap for Uni-Racer Black

The lug width of the Massena LAB Uni-Racer UR-002 is 20mm, measured from the centre of one lug hole to the centre of the other, perpendicular to the case. This dimension is critical when purchasing a replacement strap, as incorrect tolerances result in imperfect fit and movement.

The choice depends on intended use and aesthetic preference. Alligator leather with natural patina amplifies formal elegance; vegetable-tanned calf offers comfort and pronounced texture; a cotton NATO represents maximum functionality; an FKM rubber strap transforms the chronograph into its purest racing archetype. All pairings are stylistically coherent with the UR-002's DNA.

Strap replacement requires two tools: a spring bar tool or thin screwdriver to compress the internal spring. Gently lift the strap whilst pressing the spring bar, extracting it from one lug at a time. Reverse the procedure to install the new strap. Work on a clean surface and avoid excessive force.

Yes, provided the width is certified at 20mm and construction respects proper tolerances. A strap made by serious artisanal workshops—such as Casati Milano—guarantees perfect fit and no parasitic movement on the lug. Budget-tier straps often tolerate ±0.5mm, causing unwanted play.

Lifespan depends on material and usage intensity. Quality alligator with vegetable tanning withstands 5-7 years of daily wear before showing significant deterioration. Less refined calf lasts 3-4 years. Vegetable-tanned leather ages better than chrome-tanned, developing desirable patina. Prolonged sun exposure reduces lifespan; regular conditioning with appropriate creams extends it.