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

 

[rick danger]

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

Brake tech rotors are awesome. Oversize thickness. I have them on my 1290.

 

[chadster54321]

Brake tech rotors are awesome. Oversize thickness. I have them on my 1290.

Ive emailed them but hell knows how expensive they will be to make

 

[Journeyman]

I jacked up my rear rotor from sheer stupidity by letting the pads get down to metal. Now, instead of a nice gray-colored caliper, it has a brown/bronze look to it, but the caliper is working fine with a new rotor and pads. but that was after a lot more miles than you got. I wonder if one of the pistons is sticking, resulting in fast wear.

As for the reason, if you're not foot heavy, I'd agree with his explanation- causing a constant pressure to be applied. Although it seems like you would feel an unusual amount of drag when rolling the bike.

 

[chadster54321]

As for the reason, if you're not foot heavy, I'd agree with his explanation- causing a constant pressure to be applied. Although it seems like you would feel an unusual amount of drag when rolling the bike.

That and wouldn't one side of the pads would only wear faster? I mean one side appeared to maybe wear a WEE bit faster. As it had a sliver of meat left on it. Ill be taking it to the dealer since it is still under warranty. Ill update this thread with what the problem and solution was in case anyone runs into a similar issue.

 

[Rick111]

Would the brake light be on if the caliper was sticking / engaged ?

 

[rick danger]

Would the brake light be on if the caliper was sticking / engaged ?

Not if it was actuated by pressure from the pedal. Pressure in the line would go away when you let off the pedal, but the pistons would stay where they are.

 

[rick danger]

As for the reason, if you're not foot heavy, I'd agree with his explanation- causing a constant pressure to be applied. Although it seems like you would feel an unusual amount of drag when rolling the bike.

It would be easy to check just giving the rear brake a hard push, then not using it for a few miles. Then stop with the front brakes and feel the rear rotor.

 

[mo8414]

Jack the rear tire up. Hit the brake. Give her a spin to see how easy it spins.

 

[atomsplitter]

Jack the rear tire up. Hit the brake. Give her a spin to see how easy it spins.

With it spinning the drive shaft as well it won't free-wheel. If you have a set of feeler gauges see how much gap is between the pads and rotor at rest. You should be able to get a strip between pad and rotor with no pressure applied from the brake pedal.