Most strap guides focus on the handful of brands everyone searches for — Rolex, Omega, Patek Philippe. But plenty of excellent watches come from smaller or more independent houses, and finding a replacement strap for them can be harder simply because there’s less written about it. Here’s a roundup of real rubber and FKM fluoro rubber strap options for eight such brands — Cartier, Vacheron Constantin, Chopard, Bvlgari, Oris, Bell & Ross, Corum, and Porsche Design — with the specs and fit details for each.
Why Rubber or FKM Instead of the Original Strap?
A rubber or FKM strap trades the formality of leather for water resistance, sweat resistance, and low maintenance — a straightforward wipe-down keeps it looking new, where leather needs conditioning and eventually wears out. For watches originally built with a sportier profile, it’s often a more practical daily-wear choice than what shipped in the box.
Cartier Calibre: 23mm/24mm Rubber Band
Our rubber band for the Cartier Calibre series is available in 23mm and 24mm lug widths, with a silver pin buckle and a 125mm + 80mm length. It’s water and sweat resistant, and fits with quick-release spring bars or traditional pins.
Vacheron Constantin Overseas: 25mm FKM Fluoro Rubber
For the Overseas VC 4500V, 5500V, and 7900V references, our FKM fluoro rubber strap is cut to the correct fit with a 115mm + 75mm length and a folding buckle. FKM’s resistance to water, sweat, and UV makes it a strong match for a watch designed around an integrated sport bracelet.
Chopard: 23mm Silicone Rubber
Our 23mm silicone rubber strap for Chopard uses a folding deployment clasp and a 115mm + 75mm length. It’s an easy way to give a Chopard watch a sportier, more casual look while keeping the original strap in reserve.
Bvlgari Octo 102957: 24mm FKM with Alligator Pattern
Our FKM rubber strap for the Bvlgari Octo 102957 is embossed with an alligator leather pattern, giving it the dressy texture of leather while staying fully water-resistant — it won’t crack, fade, or absorb sweat the way genuine leather can. It’s cut to 24mm tapering to 18mm at the buckle, with a 120mm + 75mm length, quick-release spring bars, and a choice of silver or black pin buckle across four colors.
Oris Aquis: 24mm FKM Rubber, Six Colors
Built for the water and the wrist, our FKM rubber strap for the Oris Aquis Diver (24x12mm) uses a secure folding diver-style buckle and a 130mm + 78mm length, and comes in black, blue, green, yellow, red, or orange — enough range to match or contrast with an Aquis dial.
Bell & Ross BR01/BR03: 34mm Tapering to 24mm Rubber
Bell & Ross’s square-cased BR01 and BR03 need their own fit — our silicone rubber strap is built to their 34mm lug width, tapering to 24mm, with a 115mm + 75mm length. It’s available in classic black as well as brighter options like orange, gray, and blue.
Corum Admiral’s Cup: 22mm Rubber
Matching the nautical character of the collection, our 22mm rubber strap for the Corum Admiral’s Cup has a 125mm + 85mm length and a secure buckle closure, built for wear on and off the water.
Porsche Design P6780: 26mm Rubber
Our rubber strap for the Porsche Design P6780 Series keeps the technical, sporty look the brand is known for, with a 26mm band tapering to a 22mm buckle and a slightly shorter 78mm + 78mm length that suits smaller wrists well.
Getting the Fit Right Before You Buy
Lug widths across these eight brands range from 22mm to 34mm, and several taper from a wider lug measurement down to a narrower buckle — so it’s worth double-checking your exact model against the sizes above before ordering. Our Watch Band Size Guide covers how to measure a two-piece strap correctly, and our guide on how to measure your lug width walks through the calipers-and-ruler method if your current strap has no size marked.
Browse the full range for each brand — Cartier, Vacheron Constantin, Chopard, Bvlgari, Oris, Bell & Ross, Corum, and Porsche Design — or head to the full shop if you’re fitting a different brand.
