Are the GiroDisc Rear Rotors for 8J a bolt-on part?

Yes. The Rear Rotors for 8J are a direct replacement for the factory TT RS rear discs and need no modifications. The original calipers bolt back on, so the job is a normal rear rotor change that a competent home mechanic can complete with hand tools.

How much lighter are the TT RS rear rotors?

GiroDisc quotes about 13.2 lb for its rear rotor against roughly 15 lb for the factory part. The saving is smaller than at the front, but it is still rotating, unsprung weight, and it gives the car matched floating rotors at all four corners.

Why upgrade the rear rotors as well as the fronts?

Matched rotors give consistent pedal feel and predictable wear across both axles. The floating rear ring also resists heat distortion during repeated hard use, which helps the TT RS stay stable under braking on a track or a fast mountain descent.

Do the drive pins need any maintenance?

No routine maintenance is needed. GiroDisc makes the pins from high-strength alloy steel and cadmium plates them for long corrosion resistance. Check the cap screws are present and torqued no higher than 60 in-lb whenever the wheels are off for brake work.

What material is the rear ring made from?

The ring is GiroDisc proprietary cast iron, poured in the USA and machined start to finish at the GiroDisc facility in Bellingham, Washington. Curved vanes cast into the ring act as a centrifugal pump that pulls air in at the hub to cool the disc.

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Description

GiroDisc Rear Rotors for 8J Audi TT RS

GiroDisc’s Rear Rotors for 8J Audi TT RS bring the same two-piece floating design to the back axle, with GiroDisc quoting about 13.2 lb per rotor against 15 lb for the factory part. The ring is GiroDisc’s proprietary cast iron, poured in the USA and machined from start to finish in Bellingham, Washington, and it is carried on a 6061-T6 aluminum hat. Alloy steel drive pins let the ring expand with heat. Owners fitting GiroDisc fronts should pair them with these to keep pedal feel and wear consistent at both ends.

Fitment and Installation

The Rear Rotors for 8J bolt on in place of the original rear discs with no modifications, and the stock rear calipers are reused as they came off. Rotors are left and right handed and labeled for position so the curved vanes pump air outward. Cap screws can look loose by design; they stay at or below 60 in-lb (7 Nm).

Features

About 1.8 lb lighter per rotor than stock, according to GiroDisc
Proprietary cast iron ring poured in the USA
6061-T6 aluminum hat machined from US-sourced stock
Cadmium-plated drive pins with anti-noise spring washers
Grade 12 cap screws with hardened washers

What’s Included

Rear rotor assemblies (L/R)

Applications

Audi TT RS: 8J | 2.5L turbocharged 5-cylinder

Notes

The Rear Rotors for 8J are listed for the TT RS only
The GiroDisc 8J TT RS front rotors are the matching front set
Each rotor is labeled left or right and must be fitted on its marked side
Stock photography may not depict the actual product

Frequently Asked Questions

Are the GiroDisc Rear Rotors for 8J a bolt-on part? Yes. The Rear Rotors for 8J are a direct replacement for the factory TT RS rear discs and need no modifications. The original calipers bolt back on, so the job is a normal rear rotor change that a competent home mechanic can complete with hand tools.
How much lighter are the TT RS rear rotors? GiroDisc quotes about 13.2 lb for its rear rotor against roughly 15 lb for the factory part. The saving is smaller than at the front, but it is still rotating, unsprung weight, and it gives the car matched floating rotors at all four corners.
Why upgrade the rear rotors as well as the fronts? Matched rotors give consistent pedal feel and predictable wear across both axles. The floating rear ring also resists heat distortion during repeated hard use, which helps the TT RS stay stable under braking on a track or a fast mountain descent.
Do the drive pins need any maintenance? No routine maintenance is needed. GiroDisc makes the pins from high-strength alloy steel and cadmium plates them for long corrosion resistance. Check the cap screws are present and torqued no higher than 60 in-lb whenever the wheels are off for brake work.
What material is the rear ring made from? The ring is GiroDisc proprietary cast iron, poured in the USA and machined start to finish at the GiroDisc facility in Bellingham, Washington. Curved vanes cast into the ring act as a centrifugal pump that pulls air in at the hub to cool the disc.

About GiroDisc

GiroDisc designs, manufactures, and sells 2-piece, fully floating brake rotors for a wide range of performance vehicles. Every major component, including the hats, rotor rings, and drive pins, is manufactured in-house at their facility in Bellingham, Washington, from domestically sourced materials. GiroDisc rotors use a proprietary high-carbon iron ring formulated for superior metallurgy and thermal performance, paired with reusable machined-aluminum hats that reduce the long-term cost of maintaining a high-performance brake system. The 2-piece floating design sheds unsprung and rotating mass while remaining street-friendly, delivering race-proven braking for track and street use alike.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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GiroDisc Rear Rotors for 8J Audi TT RS [A2-152]

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GiroDisc Rear Rotors for 8J Audi TT RS

Fitment and Installation

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews