Can the GiroDisc Challenge Front Replacement Rings go on factory Ferrari hats?

No. The Challenge Front Replacement Rings are machined to bolt to GiroDisc A1-183 aluminum hats and nothing else. They do not suit the original carbon-ceramic rotors, other aftermarket hats or any factory two-piece design, so the GiroDisc front conversion must already be fitted.

At what thickness should the 458 Challenge front rings come off?

GiroDisc recommends replacing these front rings once they wear to 34mm, two millimeters below the 36mm new thickness. Change them sooner if a crack runs to the outer edge of a ring. The minimum is also marked on the hat and the ring edge.

How long does a ring change take in the paddock?

It is a straightforward bench job once the rotor is off the car. The cap screws come out, the worn ring lifts away, and the new ring goes on with the supplied hardware at no more than 60 in-lb. Most crews can do both sides between sessions.

Do the new rings change brake balance on a 488 Challenge?

No. The replacement rings share the 398mm diameter and vane design of the original GiroDisc front conversion, so the brake balance and caliper position are unchanged. The car will feel the same as it did on the first set of rings once they are bedded in.

Why are the rings sold as a pair?

Matching rings on both sides of the axle keeps friction and wear even, which matters for consistent stopping and straight-line stability. GiroDisc supplies the left and right ring together with new hardware so nothing from the old set needs to be reused.

Description

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Description

GiroDisc Challenge Front Replacement Rings for Ferrari 458 and 488

GiroDisc’s Challenge Front Replacement Rings for the Ferrari 458 and 488 are the consumable half of the A1-183 front iron conversion. Each 398mm ring starts at 36mm thick with 72 curved vanes, and is cast from GiroDisc’s high-carbon iron before being machined in Bellingham, Washington. A Challenge team burns through front iron faster than anything else on the car, so being able to refresh the friction surface while the clear-anodized hats stay put keeps running costs sensible across a season.

Fitment and Installation

The rings bolt to the existing GiroDisc A1-183 hats with the new hardware supplied in the box. They are made for GiroDisc hats only and will not mount to the factory carbon-ceramic assemblies or another brand of hat. Each ring is handed for its side, and the cap screws are never tightened past 60 in-lb (7 Nm), which preserves the float.

Features

398mm outer diameter and 36mm new thickness
72 curved vanes cast into the ring
GiroDisc high-carbon iron, poured in the USA
Machined in-house in Bellingham, Washington
Pair of rings with fresh mounting hardware

Specifications

Outer diameter: 398mm
New thickness: 36mm
Minimum thickness: 34mm
Vane count: 72 curved
Fits hats from: GiroDisc A1-183

What’s Included

Front replacement rings (L/R)
Replacement mounting hardware

Applications

Ferrari 458 Challenge: With GiroDisc A1-183 front iron conversion
Ferrari 488 Challenge: With GiroDisc A1-183 front iron conversion

Notes

The Challenge Front Replacement Rings fit only the hats of the GiroDisc 458 and 488 Challenge front iron rotor conversion
Hats are not included; the existing GiroDisc hats are reused
Rear service uses the GiroDisc 458 and 488 Challenge rear replacement rings
Stock photography may not depict the actual product

Frequently Asked Questions

Can the GiroDisc Challenge Front Replacement Rings go on factory Ferrari hats? No. The Challenge Front Replacement Rings are machined to bolt to GiroDisc A1-183 aluminum hats and nothing else. They do not suit the original carbon-ceramic rotors, other aftermarket hats or any factory two-piece design, so the GiroDisc front conversion must already be fitted.
At what thickness should the 458 Challenge front rings come off? GiroDisc recommends replacing these front rings once they wear to 34mm, two millimeters below the 36mm new thickness. Change them sooner if a crack runs to the outer edge of a ring. The minimum is also marked on the hat and the ring edge.
How long does a ring change take in the paddock? It is a straightforward bench job once the rotor is off the car. The cap screws come out, the worn ring lifts away, and the new ring goes on with the supplied hardware at no more than 60 in-lb. Most crews can do both sides between sessions.
Do the new rings change brake balance on a 488 Challenge? No. The replacement rings share the 398mm diameter and vane design of the original GiroDisc front conversion, so the brake balance and caliper position are unchanged. The car will feel the same as it did on the first set of rings once they are bedded in.
Why are the rings sold as a pair? Matching rings on both sides of the axle keeps friction and wear even, which matters for consistent stopping and straight-line stability. GiroDisc supplies the left and right ring together with new hardware so nothing from the old set needs to be reused.

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 Challenge Front Replacement Rings for Ferrari 458 and 488 [D1-183]

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GiroDisc Challenge Front Replacement Rings for Ferrari 458 and 488

Fitment and Installation

Features

Specifications

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews