An Anchor System
Kumamoto was designed as a complete platform—end-links, clasp, and strap material engineered together for a seamless, integrated feel.
Kumamoto™ System
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Seamless at the Lugs
Purpose-built end-links create a clean, continuous line from case to strap/bracelet—no awkward gaps, no generic fit.
Double Flip-Lock Security
A firm, reassuring close with refined tolerances. Built to feel precise every time you lock in—on steel or on rubber.
Refined, Not Flashy
Tool watch energy with premium execution—clean edges, tight fit, and a finish that looks sharp without shouting.
Kumamoto ™ CTS End-Link Rubber Strap for Tudor Black Bay 58
Designed for the Seiko enthusiast who demands integrated precision and everyday comfort, the Kumamoto ™ CTS End-Link Rubber Strap is a seamless upgrade for your Tudor Black Bay 58. Inspired by the robust geometry of oyster-style bracelets, this strap includes a premium cut-to-size FKM rubber strap and our 316L flip-lock clasp. This strap is designed to work seamlessly with your Tudor BB58 original end-links for a seamless, premium fit & finish.
Crafted from high-performance FKM rubber, the Kumamoto CTS offers superior durability, resistance to sweat, heat, and UV, and a soft-touch finish for all-day wear. The bracelet-style taper, subtle chamfering, and matching stainless steel deployant clasp bring a refined yet tool-ready aesthetic to your favorite watch.
Specs:
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Material: Premium FKM Rubber
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End Link: Compatible with OEM End-links for 3-link Tudor Rivet Style Bracelet. Does not include end-links.
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Width: 20mm at lugs, tapering to 16mm at the clasp
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Hardware: Brushed, corrosion resistant 316L stainless steel flip-lock deployant clasp
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Water- and sweat-resistant
Upgrade your Tudor BB58 with a strap that wears like a bracelet and performs like a dive strap—built for those who appreciate purpose-driven design with a nod to the classics.
N
Great quality strap -- feels and looks great on the BB58!
A
Fits BB 58 perfectly and the clasp is nicer than anticipated. Great quality for the money!
A
I'm very impressed with the quality & fit of the Kumamoto rubber strap for my Tudor Black Bay 58 GMT. The Delugs rubber strap I had on it previously functioned fine, but in my opinion, the Kumamoto strap is more in keeping with the vibe of the BB58 GMT. The rubber strap is more substantial and fits well in the Tudor end links (my obsessive-compulsive personality couldn't get past the gaps between the straps and the watch body with the Delugs straps). The deployment clasp is bullet-proof with a double locking mechanism. The only area of improvement I would like to see is the ability to customize the strap length to a greater degree. I have a scrawny wrist with a weird geometry that makes it necessary to have the 6 o'clock strap significantly shorter than the 12 o'clock strap in order to have the watch centered on my wrist. 2 additional cutting grooves would be ideal. I've already communicated this to Brando (who is very responsive) and he stated that they are hoping to offer a rubber strap with additional cutting grooves in a few months. Looking forward to it...
D
Very Happy with purchase & really gives the watch a new character.
