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Description
Girodisc Front Replacement Rotor Ring Set - F8x M2, M3, M4 W/ Silver/Red/Gold CalipersGirodisc is a Braking Technology Company dedicated to developing the best quality high performance braking components and solutions. The company has been in business since 2003 and is guided under the direction of company Principal Martin Meade, who spent five years as an Engineer with Porsche Engineering Services, where he played a role in developing current Porsche technology. PRODUCT INFORMATION Need new rings for your Girodisc 2 Piece Floating
Girodisc is a Braking Technology Company dedicated to developing the best quality high performance braking components and solutions. The company has been in business since 2003 and is guided under the direction of company Principal Martin Meade, who spent five years as an Engineer with Porsche Engineering Services, where he played a role in developing current Porsche technology.
PRODUCT INFORMATION
Need new rings for your Girodisc 2-Piece Floating Rotor Set? We got them. Rings come complete with all new hardware and full instructions for re-assembly; but if you choose you can send us the hats and we will do all the re-assembly and turning of the rotors for only the cost of shipping.
This service is available for the life of your rotors. Price is for a pair of rings and 2 hardware kits. Additional hardware kits are available separately upon request.
The Girodisc iron rotors replace the factory carbon ceramic rotors with no modifications necessary. We strongly recommend changing pad material to one suitable for iron rotors.
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
What is required to install the Girodisc system?
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.
How does reducing weight of the braking system benefit the vehicle?
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.
Why slotted discs?
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.
A note on drilled discs
Girodisc doesnotrecommend drilled discsfor high performance applications. The rapid heating and cooling cycles will cause cracking on the friction surface of a drilled disc. The use of high friction or racing pads will exaggerate this condition. Most pad manufacturers specifically recommend that their race pads not be used on a drilled disc for this reason. Girodisc can drill discs for an additional fee, if the customer is aware of the potential hazards of drilling the discs.
Note as example the cracking in this OE Ferrari 550 drilled disc after one track day. Also note this custom front disc of a Porsche 993 Turbo after hard use (see photos).
Please see photos attached
Should new discs and pads be bedded in and if so, how?
The answer is yes, for optimum performance, any time different friction materials or discs are introduced, a bedding procedure should be carried out.
Which direction should the discs rotate?
For maximum airflow and superior cooling, the Girodisc system uses curved vanes. For a curved vane internally vented disc, the geometry of the vanes dictates the direction of rotation. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Your discs will come with labels indicating their correct placement on the vehicle. Orienting the disc in this manner creates a centrifugal pump. The rotation of the disc causes air to be pumped from the center of the disc, through the vanes, and out through the outside diameter of the disc. This greatly enhances the disc’s ability to dissipate heat. Discs installed backwards have very limited cooling.
Models
2 Series / F87 M2 (2016-2021) / M2 Competition
2 Series / F87 M2 (2016-2021) / M2
2 Series / F87 M2 (2016-2021) / M2 CS
3 Series / F80 M3 (2014-2019) / M3
3 Series / F80 M3 (2014-2019) / M3 Competition
3 Series / F80 M3 (2014-2019) / M3 CS
4 Series / F82 / F83 (2014-2019) / M4
4 Series / F82 / F83 (2014-2019) / M4 Competition
4 Series / F82 / F83 (2014-2019) / M4 CS
4 Series / F82 / F83 (2014-2019) / M4 GTS
Shipping Notes
Free Standard Shipping on $100+ Orders to the USA.
Except Preorder products are shipped in 48 hours.
Delivery to the USA:
Standard Shipping : 3-10 business days
If time is of the essence, please consider selecting expedited delivery for faster service.
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]
Very durable toy that our little dog especially loves. It's the perfect size for a small dog and she doesn't destroy toys anyway so it's been great. It does feel very durable though and would take our chewer a little while to get to it as well.
I'm not sure it looks like a coyote but the dogs don't seem to mind. It's an attractive toy that looks great and is constructed well so it's not like a slobbery mess when left out.
Good value for the money and would make a great gift because it looks higher quality than most toys.
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Reviewed in the United States on April 14, 2026
S
StarReviewer
Los Angeles, US
★★★★★ 1
May be ballistic nylon, but the seams are flimsy.
Style: Gator, Style: Gator
I really wanted my pup to like this toy because it looks great and feels solid at first. The design is fun, the material seems tough, and it definitely gives the impression that it can handle some rough play. Unfortunately, that didn’t turn out to be the case at all.
After just about 5 minutes of play, the top seam split open and stuffing started coming out. This wasn’t even extreme chewing, just normal play, and it failed almost immediately. As you can see in the photos, the tear happened right along the top seam, which is exactly where you’d expect a toy to be reinforced. Once it opened up, the toy was essentially done.
For something marketed as ballistic nylon, this was really disappointing. It might be fine for very gentle dogs, but if your dog has even moderate chewing habits, this likely won’t last. Based on my experience, I wouldn’t recommend it. especially at 19.99 which is the price at time of my review, I feel it does not offer good value for money.
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Reviewed in the United States on April 9, 2026
A
Amazon Customer
Dallas, US
★★★★★ 5
A Surprisingly Tough Favorite for All Four of My Dogs
Style: Armadillo, Style: Armadillo
I wasn’t sure what to expect from the Hound 2.0 stuffed armadillo toy, but it has been a total hit in my house. Neither the dogs nor I have managed to find the squeaker yet—so it’s either missing or extremely well hidden—but honestly, the dogs don’t seem to care at all. They love this thing.
I have four dogs ranging from a 22 lb Boston Terrier to an 85 lb pitbull, plus two medium Blue Heelers in between, and this toy has been thoroughly tested by every size and play style. I was a little unsure whether they’d like the harder “shell” portion of the armadillo, but they actually love it. It gives the toy a unique texture and makes it feel more durable.
Before this, I knew nothing about the Hound 2.0 brand, but I’m a fan now. My little Boston Terrier is notorious for ripping every toy he touches, and this armadillo has stood up to him like a champ. The tag said it was made for outdoor play, wrestling, and chewing—and that’s absolutely true. I haven’t taken it outside yet, but inside it has survived rough play from all four dogs and still looks brand new.
I also love that each toy in this line is a different animal with the hard parts in different places. It makes them feel unique instead of just the same toy in different shapes.
I’ll definitely be buying more of these. If you have a pup—big, small, or anywhere in between—I’d recommend giving this toy a try. It’s been a winner in my multi‑dog home.
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Reviewed in the United States on March 10, 2026
J
J S
Natrona Heights, US
★★★★★ 4
Unique armadillo design
Style: Armadillo
I love the look of this armadillo toy. The flexible rubber shell gives it a spiky texture. It has reinforced nylon seams and printed eyes. The feet allow the toy to stand on its own, daring dogs to come knock it over. With a body length of 12" and standing 5" tall, the toy is of good size for even larger dogs, but it intimidated my 8lb yorkie mix. She found the hard shell and spikes off-putting and not fun. The toy is supposed to squeak, but either mine was broken or buried too deep to be useful. This was disappointing because I think a squeak would have helped my pup engage with the toy because she can't resist a noisy toy. I'd recommend this armadillo for larger dogs than my tiny pup. It seems durable with that rubber shell around the body.
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Reviewed in the United States on March 16, 2026
J
Verified Purchase
JW
Fort Morgan, US
★★★★★ 5
A hound's dream toy.
Size: Small, Style: Mallard Duck
I bought this for our "grandson"--a happy go lucky beagle--to play with while we were dogsitting. It took a while to motivate him to play with it, but eventually he caved... and then promptly proceeded to tear its insides out! I took a photo and sent it to my son, and he remarked, "Wow, it has been a long time since he played with a toy like that." So even an old hound past his prime enjoyed this toy. As for quality, this is a very well made toy. Yes, it's true that the dog ripped it to shreds, but that'll happen to any toy if the dog is determined enough. I was happy he enjoyed it. He also has two loofa dog toys here that he hardly ever touches, but this duck toy was too much for him to resist. My only suggestion is to supervise your dog while he plays with this. Besides the inner stuffing, the toy has a fuzzy surface to it, and you don't want him chewing a bunch of fuzz if he tears some out, as dogs are apt to do. Other than that, GREAT DOG TOY!
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Reviewed in the United States on November 12, 2024
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