Spring bars modern Rolex 21mm × 1.5mm
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€12,95
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Handcrafted Straps
Spring bars modern Rolex 21mm × 1.5mm
€12,95
Set of two spring bars for modern Rolex 21mm × 1.5mm, in hardened Swiss Standard steel. Blind lugs. Size introduced by Rolex on the new-generation 40mm cases: Submariner 126610, Sea-Dweller 126600, GMT-Master II 126710, modern Daytona in certain variants.
21mm is the dimensional leap of 2020. Rolex moves from 20mm to 21mm to balance the new 41mm case — wider lug, better visual integration with the Oyster bracelet. The pin remains 1.5mm: the recess is blind and the geometry essentially identical to the 20mm. Only the length of the spring bar changes.
The same piece I fit in the atelier on all modern 41mm watches with 21mm lugs.
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Free shipping Italy
24/48h delivery
30-day return
Free from Italy only
Atelier since 1984
Milan
Swiss Standard steel
316L · 10,000 cycles
SKU: MS-IT-MS-RXSB-MN-ST-1521
Worldwide shipping
I prepare and ship your order within 1–3 business days of payment. Delivery takes 1–3 business days in Italy, 3–7 in the European Union, 5–10 in the United States and Canada, and 7–15 to the rest of the world. Every parcel is tracked.
Returns and exchanges
You have 30 days from delivery to request a return or an exchange. The strap must come back as you received it: unworn, in its packaging. Write to info@milanostraps.it with your order number; once the return is accepted, I will send you the return shipping label. Made-to-measure straps cannot be returned: they are cut for your watch. Full conditions.
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Orologi compatibili
The joy of little things
Changing your strap should be as simple as changing your shoes. With us, it is.
Every strap has integrated quick-release spring bars: swap it in one gesture, no tools, no risk of scratching the lugs. The same watch shifts mood with the moment.
Frequently asked questions
Which watches do these spring bars fit?
I fit them on modern Rolex models with a 21mm lug width: Submariner 126610, Sea-Dweller 126600, GMT-Master II 126710 and some versions of the modern Daytona. These are all new-generation 41mm cases.
What is the difference compared to 20mm spring bars?
The pin remains 1.5mm, the hole is blind and the geometry is the same. Only the length of the spring bar changes, to fit the wider lug.
Why did Rolex move from 20 to 21mm?
That is the 2020 shift: with the new 41mm case, a wider lug was needed, to balance the proportions and better integrate the Oyster bracelet.
How can I tell if my Rolex has a 21mm lug width?
Check the reference engraved between the lugs at 12 o'clock. If it is one of the modern 41mm models, the lug width is almost certainly 21mm.
What steel is it?
Hardened Swiss Standard steel. The same piece I use when a sturdy spring bar is needed for these cases.