Girodisc light weight performance Rotors A1-123 A2-148 for Mercedes-AMG GTC or GTR
For SaleBrakes
Apr 3, 2025, 12:02 PM | Replies: 14 | Views: 1229
-
Price
$1,250• OBO
- Location Saddle River, NJ, 07458, USA
- Condition Used
Description:
The Girodisc system offers a direct replacement for the OE iron discs on AMG GTS, GTC, and GTR models, requiring no modifications. These rotors bolt directly onto the vehicle and fit seamlessly with the OE calipers. By upgrading to lightweight, high-performance discs instead of a full big brake kit, you reduce rotational and unsprung weight, enhancing both acceleration and suspension response while maintaining factory brake bias and ABS efficiency.
Each rotor consists of a central hat section made from U.S.-sourced 6061-T6 aircraft-grade aluminum, while the disc itself is crafted from Girodisc’s proprietary cast iron, poured and fully machined in-house in the USA. Featuring a curved vane design adapted from racing, these rotors act as a centrifugal pump, optimizing cooling performance. When replacements are needed, you can retain the aluminum hats and swap out just the discs, saving over 35% on the cost of new rotors.
The floating mount system connects the disc and hat using high-strength alloy steel pins—12 for the front and 10 for the rear—coated in cadmium for corrosion resistance. These pins absorb braking forces while allowing the rotors to expand and contract with temperature changes. Anti-noise spring washers minimize rattle, and the design ensures the rotor self-centers between the brake pads.
Specifications:
Front Rotors: P/N A1-123, 390mm diameter, 36mm new (replace at 34mm) – MSRP: $1500 (Disc: $1000, Reusable Hat: $500)Rear Rotors: P/N A2-148, 360mm diameter, 26mm new (replace at 24mm) – MSRP: $1400 (Disc: $850, Reusable Hat: $550)
Condition:
This set is in excellent condition with over 50% rotor life remaining:- Front: 35.31mm and 35.24mm
- Rear: 25.05mm and 25.25mm
Shipping:
Sold as a complete set (no partial sales). Ships within the 48 mainland U.S. states in two boxes:- Front rotors: 59 lbs total
- Rear rotors: 35 lbs total
- Total shipping weight: 94 lbs
Recommended Pads:
For optimal track performance and aggressive grip at high temperatures while maintaining smooth braking for daily or spirited driving, consider the PAGID RSL 29 Endurance Racing Brake Pads:- Front: Shape #8238
- Rear: Shape #8246
Last edited by G. P; Apr 3, 2025 at 12:05 PM.
Reply
Thread Starter
Joined: Mar 2020
Posts: 591
Likes: 341
From: Northeast USA
2020 AMG GTC
Un-sold. Buyer made a mistake in matching it to his car model.
Back on the market. Price reduced to $1050+shipping
Back on the market. Price reduced to $1050+shipping
Last edited by G. P; Jun 26, 2025 at 12:43 PM.
Thread Starter
Joined: Mar 2020
Posts: 591
Likes: 341
From: Northeast USA
2020 AMG GTC
MBWorld Fanatic!
Joined: Dec 2005
Posts: 4,057
Likes: 341
From: NJ
2009 SL63 AMG
The base cars can also be retrofitted to work with the 390mm fronts as the calipers are the same (just needs a different bracket).
Member
Joined: Jul 2017
Posts: 210
Likes: 25
From: Lake Wylie, SC
E500 Wagon, SL63 IWC, E450 Wagon
Yeah. Just got off the phone with GiroDisc. I was hoping to re-use the rear hats and just swap the discs, but the hat spec is slightly different. Ugh.
And yes, the "G.P" Newbie is what the real "G.P" said!
And yes, the "G.P" Newbie is what the real "G.P" said!
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Thread Starter
Joined: Mar 2020
Posts: 591
Likes: 341
From: Northeast USA
2020 AMG GTC
I have 2 more sets. One which is in the exact same level as the one here for $1050+ shipping and the other that is a bit newer for $1250+shipping. If you are interested please provide your car's model and year +VIN, to check comparability.
Thread Starter
Joined: Mar 2020
Posts: 591
Likes: 341
From: Northeast USA
2020 AMG GTC
second, the GiroDisc will fit your 2018 S63
i added you to my contact, DM me.
Last edited by G. P; Nov 4, 2025 at 04:29 AM.
