AnchorFLEX™ End-Link Deployant

For Tudor Black Bay GMT 41

Upgrade your Black Bay GMT 41 with FKM rubber shaped for your original Tudor end links.

Requires your original Tudor end links — spring bars included
Integrated curved-end look at the case
Fits 5.25″–8″ wrists
Soft FKM rubber, comfortable from day one

Shipping calculated at checkout.

Material: AnchorFLEX™ FKM rubber

Hardware: 316L Stainless Steel Tang-Buckle

Fitment: Made for Tudor Heritage Black Bay 41 (79230 Series)

A deliberately tight fit. We spec the end thicker than most straps for strength, so seating the spring bars takes more force than you might expect. That's by design — the fit loosens slightly after the first few installs and never gets sloppy. Take your time on the first fitting.

Attachment: Uses original Tudor bracelet end links. Spring bars are included

Length: 3-piece strap with 2 hole ends (100mm/120mm) and one buckle end (80mm) for maximum flexibility. Comfortably fits wrists from 5.25" to 8"

Important: This strap is designed for use with your original Tudor bracelet end links. Anchor end links are not included.

AnchorFlex™ End-Link Deployant

Integrated look. Clasp-secured confidence.

Fits your Tudor Black Bay GMT 41mm using your original Tudor end links. Requires your original Black Bay GMT end links — they aren't included. Spring bars are. Clasp not included unless selected at checkout.

A case-hugging profile built for our 18mm Precision Deployant Clasp. Add the clasp at checkout for a secure fit that goes on and off without threading a buckle.

Check your bracelet before ordering

This fitment depends on which bracelet your watch came on, not just which watch you own.

Fits the Black Bay GMT 41mm (M79830RB series) — 22mm lug width, 10mm center links
Does not fit the Black Bay 58 GMT (39mm)
Does not fit the Black Bay Pro (39mm)
Does not fit any watch bought without its bracelet

Measure a center link on your bracelet. If it's 10mm across, this is your strap.

The Flagship rubber, shaped for an integrated fit

Built on the same rubber and profile as the AnchorFlex Flagship you already know, cut to sit flush against the case and designed to close with a deployant clasp instead of a buckle.

Your fit, right out of the box

There's no size to choose at checkout. Every strap ships with three pieces: two clasp ends and one hole end. Pick the pairing that fits your wrist, then fine-tune at the clasp.

Why FKM

FKM fluoroelastomer is what we build every AnchorFlex strap from, and it's why they last:

Holds up to UV, heat, and chemicals
Won't crack, fade, or go brittle with age
Soft and pliable against the wrist, but structured enough to keep its shape
No sagging or collapse the way cheap rubber does

Precision Deployant Clasp: optional add-on

The strap's clasp ends are made for our 18mm Precision Deployant Clasp. Add it at checkout, or pair the strap with one you already own.

18mm, 316L stainless steel in a brushed and polished finish
Secure closure with no loose tail
Easy on and off, with no threading and no wear from repeated buckling

It's the strap you leave on.

Specifications


Material	AnchorFlex FKM rubber
Clasp	18mm Precision Deployant, brushed/polished 316L. Optional add-on, sold separately.
Attachment	Your original Black Bay GMT end links (not included). Spring bars included.
Length	3-piece: two clasp ends (75mm / 100mm), 105mm hole end
Fits	Wrists 5.25″–8″
Profile	Slim and flexible for all-day wear

FAQs

Some end-link installs can feel tight at first because the thickness rubber strap at the end-link is maximized to ensure durability. There are a few ways to get it installed:

First, try gently wiggling and pushing the spring bar through until the spring bar pops into the opposite side of the end link. This can require some effort.

You can also squeeze the rubber portion of the strap into the end link between your thumb and index finger while pushing the spring bar into place. This helps compress the rubber slightly and gives the spring bar more room to seat properly.

If those techniques do not work, our premium 1.7mm spring bars can be used as an alternative. There is no downside to using them, but we recommend trying the first two installation methods first since the standard spring bars usually work once everything is seated correctly.

If you still have trouble, contact us and we can help troubleshoot the install.

AnchorFLEX™ straps are made from premium FKM rubber and have been third-party tested to be free of harmful fluorinated “forever chemicals” within the scope of the testing performed. We do not intentionally add PFAS-based coatings, surface treatments, or chemical finishes to our straps. Because FKM is a fluorinated rubber, we avoid vague blanket claims and clearly disclose the material. Customers who prefer to avoid fluorinated rubber entirely may prefer our nylon, sailcloth, leather, or other non-FKM strap options.

AnchorFlex™ End-Link Deployant for Tudor Black Bay GMT 41 - Navy Blue