Royal Oak Offshore Strap Guide
Choosing the right MIDAS strap for your Audemars Piguet Royal Oak Offshore is straightforward once you know your watch case size. This guide covers everything you need — sizing, lug width, strap dimensions, Quick Change compatibility and a full reference list for both 42mm and 44mm models.
42mm or 44mm — how to tell which size you need
The size refers to your watch case diameter, not the strap width. The easiest way to confirm your size is to check the reference number engraved on the caseback of your watch and match it against the compatibility lists below. If you are unsure, the case diameter is also listed in your original paperwork or on the AP website under your specific reference.
As a general guide, the 42mm Royal Oak Offshore is the more common size and includes the Offshore Diver models. The 44mm is the larger, more overtly sporty case and does not include a Diver variant.
Quick Change system compatibility
Some newer Audemars Piguet Royal Oak Offshore models are fitted with the AP Quick Change system, which uses a proprietary lug attachment rather than a standard spring bar. MIDAS straps are designed for use with a standard spring bar and tang buckle system and are not directly compatible with the Quick Change system.
If your Royal Oak Offshore has the Quick Change system, it can be retrofitted with standard endlinks by a qualified watchmaker, after which a MIDAS aftermarket AP rubber strap will fit correctly. If you are unsure whether your model has the Quick Change system, please check your reference number against the lists below or contact us before purchasing.
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42mm Royal Oak Offshore strap specifications
| Specification | Detail |
|---|---|
| Compatible case size | 42mm |
| Lug width at case end | 28mm |
| Buckle width | 22mm |
| Long piece | 107mm x 28mm |
| Short piece | 72mm (tapers 28mm to 22mm) |
| Material | Premium rubber |
| Clasp type | Tang buckle only |
| Buckle included | Yes, free 22mm tang buckle |
| Quick Change compatible | No |
44mm Royal Oak Offshore strap specifications
| Specification | Detail |
|---|---|
| Compatible case size | 44mm |
| Lug width at case end | 30mm |
| Buckle width | 24mm |
| Long piece | 116mm x 30mm |
| Short piece | 77mm (tapers 30mm to 24mm) |
| Material | Premium rubber |
| Clasp type | Tang buckle only |
| Buckle included | No, use your existing 24mm buckle |
| Quick Change compatible | No |
Compatible references — 42mm Royal Oak Offshore
The references listed below are common 42mm Royal Oak Offshore models confirmed as compatible with MIDAS aftermarket AP rubber straps. This list covers the most frequently owned references but is not exhaustive. If your reference is not listed, please contact us before purchasing as additional models may also be compatible.
26238CE, 26470PT, 26238OR, 26238OK, 26470OR, 26178OK, 25940OK, 26067OR, 26238ST, 26170ST, 26237ST, 25721ST, 26470ST, 25770ST, 25940SK, 26020ST, 26170TI, 26299OR, 26400SO, 26238TI, 25721TI, 26471SR, 26089BC, 26470BA, 25721BA, 25854ST
Compatible references — 42mm Royal Oak Offshore Diver
The references listed below are common 42mm Royal Oak Offshore Diver models confirmed as compatible with MIDAS AP rubber replacement straps.
15706AU, 15720CN, 15707CB, 15707CE, 15711OI, 15710ST, 26703ST, 15703ST
Compatible references — 44mm Royal Oak Offshore
The references listed below are common 44mm Royal Oak Offshore models confirmed as compatible with MIDAS aftermarket AP rubber straps. If your reference is not listed, please contact us before purchasing.
26400AU, 25940SK, 26400IO, 26401PO, 26401RO, 26404OR, 26420IO, 26420SO, 26420TI, 26470OR
Frequently asked questions
What is the difference between the 42mm and 44mm Royal Oak Offshore strap?
The 42mm strap has a 28mm lug width and includes a free 22mm buckle. The 44mm strap has a 30mm lug width and uses your existing 24mm buckle. The two straps are not interchangeable.
Can I use a MIDAS strap as a Royal Oak Offshore OEM strap replacement?
Yes. MIDAS straps are designed as a direct aftermarket replacement for the original Audemars Piguet OEM Royal Oak Offshore strap. They fit using the same standard spring bar system as the original strap.
Is my Royal Oak Offshore compatible with a MIDAS rubber strap?
Most standard Royal Oak Offshore and Offshore Diver models using a traditional spring bar attachment system are compatible. Models with the AP Quick Change system require standard endlinks to be fitted first. Check your reference against our lists above or contact us if you are unsure.
How do I swap my Royal Oak Offshore strap?
See our full step by step strap installation guide for instructions on how to change your Royal Oak Offshore rubber strap safely at home.
My reference is not listed — what should I do?
Contact us before purchasing. Our team can advise whether your specific model is compatible with a MIDAS Royal Oak Offshore replacement strap.
Browse the full collection
42mm Royal Oak Offshore Straps — shop all 14 colours
44mm Royal Oak Offshore Straps — shop all 14 colours
MIDAS is not affiliated with Audemars Piguet Holding SA.