Will my factory JCW caliper and pads work with these MINI JCW front brake rotors?

Yes. The MMX MINI JCW front brake rotors retain the OEM front caliper, mounting hardware, and hub. OEM or aftermarket front pads are both compatible; pads are not included and must be sourced separately.

Are these MINI JCW front brake rotors larger than the stock JCW disc?

No. These match the OEM JCW 335mm front diameter exactly. The performance gains come from the 2-piece floating construction and improved thermal efficiency, not an increase in rotor size — which means no caliper, bracket, or hardware changes are required.

What makes the floating design better for these MINI JCW front brake rotors?

The floating bobbin mounting allows the high-carbon iron friction ring to expand radially and axially as it heats rather than fighting against a fixed centre hat. This eliminates the warping and surface cracking that limit the OEM single-piece disc under repeated hard braking, extending both rotor and pad life significantly.

Does this fit the MINI Cooper S as well as the JCW?

Cooper S models with the smaller 294mm or 316mm OEM front rotor are not direct-fit confirmed for these MINI JCW front brake rotors. Contact MMX or Bulletproof Automotive to verify your specific build before ordering.

Should I upgrade the rear MINI JCW brake rotors at the same time?

For a complete, balanced brake refresh, pairing these MINI JCW front brake rotors with the matching 325mm rear rotor conversion (MMR31-1411R) gives matched thermal behavior and consistent braking front to rear. The front set works standalone, but the full refresh delivers better balance.

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Description

MMX 2-Piece Floating Front Rotor Set 335x30mm for F55 / F56 / F57 MINI JCW

MINI JCW front brake rotors from MMX Performance are the cleanest brake upgrade available for the Gen 3 MINI without touching the caliper or rotor diameter, matching the OEM JCW 335mm front size exactly while swapping the factory single-piece disc for a true floating 2-piece rotor. The improvements come from construction, not size: a proprietary high-carbon iron friction ring with MMX’s signature directional groove pattern rides on a CNC-machined 6061-T6 aircraft-specification aluminum center hat via floating bobbins that allow the ring to expand radially and axially as it heats, eliminating the warping and surface cracking that limit the OEM single-piece disc under sustained hard use. Up to 30% more thermally efficient than the factory JCW disc, the MMX MINI JCW front brake rotors deliver a consistent, honest pedal deep into braking events and significantly longer rotor life across track-day cycles. Installation is fully plug-and-play. The OEM front caliper, mounting hardware, and hub are all retained, and OEM or aftermarket pads are compatible; pads are sold separately. Supplied as dedicated left and right directional units with bobbins pre-installed; note this rotor is sized for the JCW 335mm front diameter, and Cooper S models with the smaller OEM front rotor are not direct-fit confirmed.

Features

2-piece floating construction friction ring expands freely on bobbins under heat rather than warping
High-carbon iron rotor ring with MMX signature directional groove pattern for stronger initial bite
CNC-machined 6061-T6 aircraft-specification aluminium centre hat
Up to 30% improved cooling efficiency over the OEM JCW disc
Plug-and-play installation: OEM caliper, hardware, and hub all retained
Compatible with OEM or aftermarket front brake pads
Supplied as dedicated left and right directional pair, bobbins pre-installed
1-year manufacturer warranty against defects in materials and workmanship

Applications

MINI JCW: F55, F56, F57 | 2015-present

Notes

Discs are directional left and right specific. Verify orientation before installation.
This rotor matches the OEM JCW 335mm front diameter. Cooper S models with the smaller OEM front rotor (294mm or 316mm) are not direct-fit confirmed. Contact us to verify before ordering.
F54 Clubman and F60 Countryman front fitment is not confirmed by MMX. Contact us before ordering for those chassis
Pair with the 325mm rear rotor conversion (MMR31-1411R) for a complete F-chassis MINI brake refresh

Frequently Asked Questions

Will my factory JCW caliper and pads work with these MINI JCW front brake rotors? Yes. The MMX MINI JCW front brake rotors retain the OEM front caliper, mounting hardware, and hub. OEM or aftermarket front pads are both compatible; pads are not included and must be sourced separately.
Are these MINI JCW front brake rotors larger than the stock JCW disc? No. These match the OEM JCW 335mm front diameter exactly. The performance gains come from the 2-piece floating construction and improved thermal efficiency, not an increase in rotor size — which means no caliper, bracket, or hardware changes are required.
What makes the floating design better for these MINI JCW front brake rotors? The floating bobbin mounting allows the high-carbon iron friction ring to expand radially and axially as it heats rather than fighting against a fixed centre hat. This eliminates the warping and surface cracking that limit the OEM single-piece disc under repeated hard braking, extending both rotor and pad life significantly.
Does this fit the MINI Cooper S as well as the JCW? Cooper S models with the smaller 294mm or 316mm OEM front rotor are not direct-fit confirmed for these MINI JCW front brake rotors. Contact MMX or Bulletproof Automotive to verify your specific build before ordering.
Should I upgrade the rear MINI JCW brake rotors at the same time? For a complete, balanced brake refresh, pairing these MINI JCW front brake rotors with the matching 325mm rear rotor conversion (MMR31-1411R) gives matched thermal behavior and consistent braking front to rear. The front set works standalone, but the full refresh delivers better balance.

About MMX Performance

MMX Performance is a UK-based specialist in performance parts for BMW and MINI vehicles, crafting high-quality upgrades that blend precision engineering, rigorous testing, and motorsport heritage. Driven by enthusiast culture, MMX designs its products in the UK, often putting them through track validation, to ensure durability, fitment accuracy, and on-road performance. Their catalog spans drivetrain components, spacers, hardware, and chassis enhancements, all tailored to elevate both the driving experience and visual appeal of BMW and MINI models.

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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MMX 2-Piece Floating Front Rotor Set 335x30mm for F55 / F56 / F57 MINI JCW [MMR31-1410F]

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MMX 2-Piece Floating Front Rotor Set 335x30mm for F55 / F56 / F57 MINI JCW

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Notes

Frequently Asked Questions

About MMX Performance

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