Which SL models do the GiroDisc Rear Rotors for R230 fit?

GiroDisc lists the GiroDisc Rear Rotors for R230 for the Mercedes-Benz SL55 AMG and SL63 AMG. Both belong to the R230 generation of the SL. If the car carries an optional or modified brake system, check with Bulletproof Automotive before ordering.

Is the SL55 rear rotor a direct replacement?

Yes. GiroDisc states that the rotor is a direct replacement for the original disc and that no modifications are necessary. The factory rear calipers bolt back on, so the brake bias and ABS efficiency of the SL stay as Mercedes-AMG designed them.

How many cooling vanes does the R230 rear ring have?

Forty-eight. The vanes are curved and directional, so as the rotor turns they act as a centrifugal pump, drawing air in at the hub and forcing it out through the disc. That is why each rotor is made for one side of the car.

Is there a dimpled version of the SL rear rotor?

Yes. GiroDisc lists the A2-030DS as a separate dimpled and slotted version for the same SL55 and SL63 application. Both versions share the two-piece floating construction, and the choice comes down to the friction face the owner prefers. Each has its own part number.

What happens when the SL63 rear rings wear out?

The aluminum hats are reusable, so only the iron needs replacing once it reaches the minimum thickness marked on the hat and ring edge, or if a crack runs to the edge. Contact Bulletproof Automotive for the matching GiroDisc ring when that time comes.

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Description

GiroDisc Rear Rotors for R230 Mercedes-Benz SL55 and SL63 AMG

GiroDisc’s Rear Rotors for R230 Mercedes-Benz SL55 and SL63 AMG give the big AMG roadster a two-piece floating rear disc with 48 curved directional vanes, fitted directly in place of the factory part. The original calipers stay, so the brake bias and ABS efficiency do not change. GiroDisc casts the ring from its own iron in the USA and machines it in-house, then floats it on a hat of US-sourced 6061-T6 aluminum. For an R230 owner who enjoys the car’s pace on open roads, this is a quiet upgrade with nothing to modify.

Bolt-On and Go

No modifications are needed to fit the GiroDisc Rear Rotors for R230: the stock discs come off, the new assemblies go on, and the calipers refit unchanged. High-strength alloy steel drive pins, made by GiroDisc and cadmium plated, are secured by grade 12 cap screws with hardened washers. Anti-noise spring washers allow the ring to grow with heat while preventing cold rattle.

Features

48 curved directional vanes
Direct replacement for the factory rear disc
Works with the original rear calipers
Cadmium-plated alloy steel drive pins
Grade 12 cap screws with hardened washers
US-sourced 6061-T6 aluminum hat

What’s Included

Rear rotor assemblies (L/R)

Applications

Mercedes-Benz SL55 AMG: R230 | 5.4L supercharged V8
Mercedes-Benz SL63 AMG: R230 | 6.2L V8

Notes

A dimpled and slotted version is listed as the GiroDisc SL55 and SL63 dimpled slotted rear rotors
Rotors are left and right handed and labeled for position
Cap screws are never tightened beyond 60 in-lb (7 Nm)
Stock photography may not depict the actual product

Frequently Asked Questions

Which SL models do the GiroDisc Rear Rotors for R230 fit? GiroDisc lists the GiroDisc Rear Rotors for R230 for the Mercedes-Benz SL55 AMG and SL63 AMG. Both belong to the R230 generation of the SL. If the car carries an optional or modified brake system, check with Bulletproof Automotive before ordering.
Is the SL55 rear rotor a direct replacement? Yes. GiroDisc states that the rotor is a direct replacement for the original disc and that no modifications are necessary. The factory rear calipers bolt back on, so the brake bias and ABS efficiency of the SL stay as Mercedes-AMG designed them.
How many cooling vanes does the R230 rear ring have? Forty-eight. The vanes are curved and directional, so as the rotor turns they act as a centrifugal pump, drawing air in at the hub and forcing it out through the disc. That is why each rotor is made for one side of the car.
Is there a dimpled version of the SL rear rotor? Yes. GiroDisc lists the A2-030DS as a separate dimpled and slotted version for the same SL55 and SL63 application. Both versions share the two-piece floating construction, and the choice comes down to the friction face the owner prefers. Each has its own part number.
What happens when the SL63 rear rings wear out? The aluminum hats are reusable, so only the iron needs replacing once it reaches the minimum thickness marked on the hat and ring edge, or if a crack runs to the edge. Contact Bulletproof Automotive for the matching GiroDisc ring when that time comes.

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 R230 Mercedes-Benz SL55 and SL63 AMG [A2-030]

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GiroDisc Rear Rotors for R230 Mercedes-Benz SL55 and SL63 AMG

Bolt-On and Go

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews