Rear brake pads already wore out and damaged rotor

[atomsplitter]

Do u have the part number for the galfer wave rotor? Ive scoured the internet looking for a rear rotor to replace this one as well as the part number for galfer. But only thing i could find for the bike was galfer front rotors. I didn't feel any sort of pulsing indicating warpage however

No, I don't have a part number, and looking into it a bit further nobody (yet) makes a wave rear disc rotor for the GT or R models. There are standard disc rotors available from Triumph. If you want a custom rotor cut, Co-Pilot (AI platform) has this list:

Top Custom Motorcycle Brake Rotor Builders​

• Braketech USA — High‑end performance brake specialists. They offer custom rotor programs, floating carriers, and exotic materials. Known for superb tolerances and motorsport‑grade work.
• ISR Brakes Sweden — Boutique European brake manufacturer. They will machine custom rotors and carriers for unusual bolt patterns or one‑off builds.
• Galfer Custom Shop — Galfer normally sells production rotors, but their U.S. division will fabricate custom wave rotors if you provide CAD or precise measurements.
• EBC Custom Division — EBC doesn’t list a Rocket 3 GT rear rotor, but they do accept custom rotor requests through their UK technical department.
• Spiegler Performance Parts — Known for brake lines, but they also partner with rotor fabricators and can commission custom discs.
• Moto‑Machine CNC Shops — Independent CNC machining houses that cut rotors from stainless blanks using your drawings or a physical sample.

How to contact Galfer USA for a custom rotor​

Galfer handles custom rotor work through their Technical / Custom Shop division. These are the most direct and effective contact points:

Primary Phone (Tech & Custom Work)​

Galfer USA 800‑685‑6633 This line reaches their tech department, which is the group that handles custom rotor requests.

Direct Email for Custom Rotor Inquiries​

tech@galferusa.com This is the address they use for custom rotor measurements, quotes, and design discussions.

Physical Address (if sending your OEM rotor for duplication)​

Galfer USA
310 Irving Dr.
Oxnard, CA 93030 USA