SKU: 3050191804

GiroDisc 03-08 Mercedes-Benz SL55 (R230 w/ o P30 Package) Slotted Rear Rotors

Sale price$588.60 Regular price$654.00
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Description

GiroDisc 03-08 Mercedes-Benz SL55 (R230 w/ o P30 Package) Slotted Rear RotorsSold priced in pairs Welcome to GiroDisc! Brake rotors have long been the overlooked link in performance car braking systems. Traditional 1 piece brake rotors are heavy and retain heat, diminishing their effectiveness and adding unsprung weight that adversely affects handling. When GiroDisc was founded in 2003, we made it our mission to design and manufacture 2 piece brake rotors that would perform flawlessly at the limits. Our fully floating design


Sold/priced in pairs


Welcome to GiroDisc!

Brake rotors have long been the overlooked link in performance car braking systems. Traditional 1-piece brake rotors are heavy and retain heat, diminishing their effectiveness and adding unsprung weight that adversely affects handling.

When GiroDisc was founded in 2003, we made it our mission to design and manufacture 2-piece brake rotors that would perform flawlessly at the limits. Our fully-floating design uses tension hardware to ensure that our rotors are silent on the street, but ready to go on the track.

By specializing in this area, we can dedicate our efforts to push our engineering and manufacturing to the highest levels in the industry. Customers around the world have found success maximizing the capabilities of their existing brake systems by installing GiroDisc rotors. This often negates the need for a pricier, more complex upgrade like a big brake kit.

GiroDisc is headquartered in Bellingham, Washington, where we design, engineer, manufacture and fulfill orders on site.


The primary purpose of the Girodisc system is to reduce unsprung and overall vehicle weight. The secondary purpose is to increase the ventilation and cooling capacity of the brake disc while retaining it's original dimensions. This is accomplished by using two-piece disc construction. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum.

The disc is made from cast iron, to the same specification and material as used by professional racing organizations. It is a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc. The rotor and hat have a floating mount system, which utilizes high strength alloy steel drive pins, manufactured by Girodisc to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by grade 12 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring clips on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor
to self center between the pads.


Important Questions Answered

Q: What is required to install the Girodisc system?

A: The Girodisc system is a direct replacement for the OE disc.
No modifications are necessary. The disc will bolt directly to the car and work with OE calipers and pads perfectly. Once the Girodisc system is in place, simply replace the cast iron rotor when needed. Some discs are larger in diameter and come with caliper spacers. If longer bolts are required, they are also supplied.

Q: How does reducing weight of the braking system benefit the vehicle?
A: The Girodisc will generally weigh between 4 8 lbs less than the oe disc it will replace. This is due to the heavy cast iron hat section being replaced with lightweight, high strength aluminum. The mass of any vehicle requires energy to accelerate or decelerate. Reducing the vehicle mass improves acceleration, and requires less energy to be dissipated during deceleration. Rotating mass requires additional energy in order to increase or decrease its speed of rotation. Decreasing the mass of the disc has a great benefit due to reduction in rotational inertia. This will allow more of the braking force to be available to decelerate the vehicle, not the disc.
Additionally, the mass of the brake system is also unsprung mass. Reducing the unsprung mass has the additional benefit of improved suspension performance, resulting in enhanced ride and handling. Rotating masses require additional energy to vary the plane on which they turn. The lighter the disc, the quicker the response of the vehicle steering due to the reduction in gyroscopic effect/rotational inertia of the disc. As an example, compare the weight of the Ferrari 360 OE disc at 18.2 lbs, and the Girodisc at 14 lbs. The Girodisc is 4.2 lbs lighter per disc. Replacing all four discs will save 16.8 lbs of rotating, unsprung mass.

Q: Why slotted discs?
A: The edges of the slots continuously clean and refresh the pad surface. This will allow the pads to have a maximized friction surface always available. Additionally, they prevent containments from collecting between the pad and disc interface.
The disc is lightened, decreasing its rotational inertia.
Slots prevent the formation of a water film on the disc in wet weather, maintaining the best brake response.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 3050191804

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Nelson
Birmingham, US
★★★★★ 5
Monitor
Size: 27" 240hz/FHD
Great quality, value for money, refresh rate and good appearanve
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Reviewed in the United States on May 7, 2026
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Young
Houston, US
★★★★★ 5
Good product for the price.
Size: 27"/QHD/200Hz
This monitor works great. I’ve used it for a while now and I haven’t had issues with this one. Screen size is good and refresh rate isn’t bad either.
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Reviewed in the United States on March 30, 2026
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BG Tech Guy
Omaha, US
★★★★★ 5
Love These Monitors - Nothing But Love/Performance Here!
First and foremost, yes these are the BEST budget CURVED monitors I felt deservers my time, effort and money. I've been into electronics and computers since the beginning of BBS's. Lol. I wanted to upgrade and bought the dual setup during Amazon day. Blew me away. Couple tips I'll share so that you can get the Most out of these monitors. Tips: 1 - Don't buy CRAP cables. DON'T. Look at the specs, the refresh rates and what they are capable of - speed!!!; 2 - Make sure you have a GOOD quality GPU. If not you won't even be able to enjoy the investment of the these monitors. Invest in a GPU of at LEAST 8GB 1080p min with BOTH DP and HDMI ports.; 3 - With that being said, these monitors use MST!! Daisy chain them together off the DP port for an AMAZING viewing pleasure. If not, you CAN you both ports. Run your main to from the DP port (WAY BETTER quality than the HDMI) and the other using the HDMI 1.2. Again, CABLES ARE IMPORTANT. Crap cables = degregaged signal/sound loss. 4 - When you get it/them make SURE your GPU drivers are up to date. Configure on your operating system and BOOM.. ready to rock. I researched PLENTY of options and I'm ESTACTIC about these. I believe the deal I got was UNREAL for the price, QHD monitors and almost ..almost everything I needed. 1440p - incredible. Ebay/AMZ for a GOOD GPU card and cables.. well worth your time.
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Reviewed in the United States on August 20, 2023
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TJ
Waukegan, US
★★★★★ 4
Great value and great monitor
Size: 27"/QHD/200Hz
As a note to new buyers: a chemical-like odor may be emitted from your monitor's exhaust for the first 2-3 weeks--at least mine did. I did some research and this was likely attributed to some cleaning chemicals from the factory, and it is burning off from the heat of the monitor. Simply have good ventilation in your room, and the odor should dissipate in 2-3 weeks. I've had this monitor for over a year now, and there is no odor anymore. Now, for the actual review: This monitor is great quality for the price! Not perfect, as I've found this monitor doesn't display smooth gradients of dark very well. For example, when I'm in a dark room in a video game, the dark ambient colors show slightly pixelated rather than smoothly blended. Other than that, this monitor works like a charm! Colors are great, and monitor settings are easily adjustable. One complaint I have is that I can't change the monitor's brightness using the Windows OS' brightness settings--you have to change the brightness/contrast using the monitor's buttons.
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Reviewed in the United States on December 2, 2024
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Lauren
Waukegan, US
★★★★★ 5
Great quality
Size: 27" 240hz/FHD
I bought this for my son as a second monitor. Graphics are sick! Feels like you're really in the game. My son absolutely loves it.
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Reviewed in the United States on April 25, 2026

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