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Products
Floating structure design, adapting to thermal expansion of the disc during braking.
Grooved pattern on the disc surface, helping to discharge debris and water.
Direct-fit for E-car OEM braking systems, no modification needed; each unit checked for runout before leaving the factory.
Equipped with anti-corrosive coating to prevent rust during use.
Meets OEM specifications, matching E-car braking system requirements.
Combined floating and grooved design improves heat dissipation, reducing brake fade.
Grooves keep brake pad surfaces clean, enhancing initial brake "bite" for stable braking response.
Anti-corrosive coating extends service life, suitable for different use environments.
Direct-fit design enables easy installation, avoiding post-installation noise or vibration.
Reduces brake pad wear, lowering the frequency of component replacement.
Tips：
The Floating Grooved Brake Disc for Electric Vehicles is a high-performance component representing the pinnacle of braking system technology. It combines two advanced designs—floating construction and grooved disc surface—specifically engineered to meet the demanding requirements of electric vehicles.
Handling Extreme Heat: Electric vehicles are heavy, generating significant kinetic energy during deceleration. The floating brake disc connects the friction ring (outer ring) and mounting hub (inner ring) via specialized floating alloy rivets, allowing the friction ring minor radial and axial thermal expansion space.
Eliminating Thermal Stress: During sustained intense braking that generates extreme temperatures, traditional monolithic brake discs warp and deform due to thermal stress, causing brake judder. The floating structure effectively absorbs thermal expansion stress, significantly reducing thermal deformation to ensure smooth braking with no abnormal pedal feel.
Ultimate Heat Resistance: By preventing deformation and facilitating efficient heat dissipation, its friction coefficient maintains remarkable stability even under extreme temperatures, providing ultimate safety assurance for track driving or continuous downhill mountain descents.
Scraping Effect: Radial grooves on the disc surface act like scrapers, continuously removing oxidation layers, water films, and brake dust from the pad surface to maintain optimal friction contact.
Enhanced Initial Response: Critical for electric vehicles. Energy recovery reduces mechanical braking frequency, making discs prone to rust. The grooved design ensures pads immediately contact the high-performance surface during emergency stops, eliminating rust-induced braking delays.
Gas Evacuation and Heat Dissipation: At high temperatures, brake pad material vaporizes, forming gas pockets between friction surfaces that degrade braking performance. The grooves rapidly expel these gases while increasing heat dissipation area.
Matching Heavy Vehicle Weight and High Torque: The astonishing weight and acceleration capabilities of electric sports cars or high-performance SUVs demand equally robust braking systems. Floating grooved discs represent one of the ultimate solutions to meet these demands.
Addressing Challenges from Energy Recovery: Resolves issues of corrosion and delayed brake response caused by reduced braking system usage frequency.
Must be paired with high-performance brake pads: To realize their full potential, high-performance brake pads must be installed. Ordinary brake pads cannot deliver their advantages.
Overview
This product is a floating grooved brake disc engineered specifically for electric vehicles (E‑cars). It combines three advanced design features: a two‑piece floating construction that manages thermal expansion and reduces distortion, a grooved friction surface that provides self‑cleaning action, and ventilated design for effective heat dissipation. The floating design uses a separate friction ring and lightweight steel or aluminium hat, reducing unsprung weight and improving thermal stability—both critical factors for EV performance and efficiency. The grooved surface addresses the reduced friction brake usage characteristic of EVs, preventing pad glazing and maintaining responsive braking. This disc is designed for a wide range of electric vehicles and offers EV owners a premium replacement solution that balances performance, durability, and efficiency.
Why Electric Vehicles Need a Different Brake Disc Design
The Three EV Braking Challenges
1. High Vehicle Weight
EV battery packs add significant weight—typically 300‑500 kg more than equivalent ICE vehicles.
Greater weight means greater kinetic energy that must be dissipated during braking.
The brake discs must have adequate thermal capacity and heat dissipation capability.
2. Reduced Friction Brake Usage
Regenerative braking handles a substantial portion of deceleration in normal driving.
Friction brakes are used less frequently—sometimes only 20‑30% as often as in ICE vehicles.
Reduced usage leads to corrosion risk, pad glazing, and surface contamination.
3. Instant Torque Delivery
Electric motors deliver maximum torque from zero RPM.
This means rapid acceleration and, consequently, the need for rapid, confident deceleration.
The braking system must respond immediately and consistently when called upon.
How Floating + Grooved Design Addresses These Challenges
Floating design → Manages thermal expansion from high‑energy stops, reduces disc warping and vibration.
Grooved surface → Provides self‑cleaning action, preventing pad glazing and corrosion build‑up.
Ventilated construction → Effective heat dissipation for heavy vehicle weight.
Lightweight hat → Reduces unsprung weight, contributing to EV efficiency and range.
Floating Design – Thermal Management and Weight Reduction
How Floating Construction Works
The disc consists of two separate components: a friction ring (cast iron) and a mounting hat (steel or aluminium).
The ring and hat are connected through a floating mechanism—typically bobbins or pins that allow limited radial expansion.
The ring expands freely with heat; the hat remains dimensionally stable.
Thermal Management Benefits
Under heavy braking, the friction ring heats up and expands.
In a fixed (one‑piece) disc, this expansion creates stress that can cause warping and vibration.
In a floating disc, the ring expands independently, eliminating this stress.
Result: Consistent pedal feel, reduced judder, and longer disc life.
Weight Reduction
The hat can be manufactured from aluminium, which is significantly lighter than cast iron.
Reduced unsprung weight improves suspension response and ride comfort.
For EVs, weight reduction contributes directly to improved range—every kilogram counts.
Why This Matters for E‑cars
EVs are heavier than ICE vehicles, generating more heat during braking.
The floating design manages this heat more effectively than fixed discs.
The weight reduction of an aluminium hat offsets some of the battery weight penalty.
Grooved Design – Self‑Cleaning for Reduced Friction Brake Usage
Why Grooves Are Essential for EVs
With regenerative braking handling most deceleration, friction brakes are used less often.
This reduced usage allows moisture, dust, and corrosion to accumulate on the disc surface.
Without regular cleaning, the pads can glaze and the disc surface can become contaminated.
When the friction brakes are finally needed, they may feel less responsive or grabby.
How Grooves Solve This
As the disc rotates, the grooves wipe across the brake pad surface.
This action removes surface corrosion, dust, and debris from the pad‑disc interface.
The surface remains clean and ready for effective braking when needed.
The grooves also prevent pad glazing by continuously refreshing the pad surface.
Additional Groove Benefits
Improved initial bite – The grooved surface provides better pad engagement from the first press.
Enhanced wet‑weather performance – Grooves channel water away from the friction zone.
Consistent performance over time – Stable braking characteristics throughout the disc's service life.
Floating + Grooved – The Synergy for E‑cars
The combination of floating construction and grooved surface is particularly powerful for electric vehicles:
| EV Challenge | Floating Design Contribution | Grooved Design Contribution |
|---|---|---|
| High weight → high heat | Manages thermal expansion, prevents warping | Ventilated + cooling holes (optional) help dissipate heat |
| Reduced friction brake use | Stable mounting interface reduces corrosion risk | Self‑cleaning removes corrosion and contaminants |
| Need for instant response | Consistent pedal feel, no judder | Improved initial bite, immediate response |
| Efficiency/range concerns | Lightweight aluminium hat reduces unsprung weight | Grooves have minimal weight impact while delivering significant performance benefit |
Ventilated Construction – Thermal Management for EV Weight
Internal cooling vanes between the two friction faces promote airflow.
Air is drawn from the centre and expelled outward, dissipating heat.
For EVs—which are heavier than ICE vehicles—this ventilation is essential.
Reduced heat build‑up means less risk of fade and longer component life.
Hub Brake Disc – Integrated Assembly for Simplified Installation
Where applicable, the disc is supplied as a complete unit including the hub assembly.
This simplifies installation for workshops and DIY owners.
The correct bearing preload and concentricity are set at the factory.
Reduces installation time and eliminates assembly errors.
Surface Protection Options – Corrosion Resistance for EVs
Why Corrosion Protection Is Critical for E‑car Brake Discs
EV friction brakes are used less frequently, meaning moisture and salt are not regularly burned off.
This makes corrosion protection more important for EV discs than for ICE vehicle discs.
Oiled
Light rust‑preventive oil film applied during production.
Protects during storage and transit.
Easily cleaned before installation.
Painted
Durable paint applied to the hat and outer edges.
Provides long‑term corrosion resistance.
Maintains a clean, professional appearance.
Coated
Advanced anti‑corrosion coating (zinc or geometric).
Superior long‑term protection.
Gradually wears from the friction area during normal braking.
The highest level of corrosion protection for demanding EV applications.
Performance Design Options
Grooved (Standard)
Self‑cleaning, improved initial bite, enhanced wet‑weather performance.
The standard configuration for this product.
Grooved + Drilled (Optional)
Adds cooling holes across the friction surface for even greater heat dissipation.
Further enhances water evacuation.
Ideal for EV owners who drive in mountainous areas or prefer more performance‑oriented braking.
Ventilated (Standard)
All variants include the ventilated internal vane structure as standard.
Essential for managing the thermal demands of heavier EV weights.
Who Is This Product For?
E‑car Owners
For drivers of electric vehicles—Tesla, BYD, NIO, XPeng, Volkswagen ID, Hyundai Ioniq, Kia EV, and others.
For those who understand the unique braking demands of EVs and want a disc designed for those characteristics.
For owners who value performance, durability, and efficiency.
E‑car‑Focused Workshops
For service centres that specialise in or regularly service electric vehicles.
The floating + grooved design provides a premium option to recommend to EV customers.
Hub‑integrated assembly simplifies installation.
Fleet Operators with EVs
For businesses operating electric vehicle fleets.
The corrosion‑resistant finishes and self‑cleaning grooves reduce maintenance issues.
Durable construction reduces replacement frequency and operating costs.
Performance‑Oriented EV Drivers
For EV owners who enjoy spirited driving and want braking performance that matches the instant torque delivery of their vehicle.
The floating design, grooved surface, and optional drilling provide enhanced braking feel and response.
The EV Efficiency Connection – Reducing Unsprung Weight
Unsprung weight—the mass of components not supported by the suspension—directly affects handling, ride quality, and efficiency.
The aluminium hat in this floating design reduces unsprung weight compared to a one‑piece cast iron disc.
Reduced unsprung weight improves suspension response, allowing the tyres to maintain better contact with the road.
For EVs, this translates to improved efficiency and, potentially, extended range.
Every kilogram saved on unsprung components contributes to the overall efficiency of the vehicle.
Quality Assurance and Manufacturing Standards
Manufactured to OEM‑grade specifications for fitment and compatibility.
Floating mechanism engineered for smooth, consistent operation.
Groove geometry and depth controlled for consistent self‑cleaning and bite performance.
Dimensional accuracy verified—run‑out and concentricity controlled to tight tolerances.
Ventilation vane structure checked for casting integrity.
Surface finish controlled for proper pad bedding and consistent friction.
Corrosion resistance of surface finishes validated through standardised testing.
Fitment and Compatibility
Designed for a wide range of electric vehicles (E‑cars)—Tesla, BYD, NIO, XPeng, Volkswagen ID, Hyundai Ioniq, Kia EV, and others.
Front and rear axle applications available—consult the catalogue for specific fitment.
Floating two‑piece construction with grooved, ventilated friction ring.
Direct replacement—no modifications required.
Consult the product catalogue or contact Winhere with vehicle details (model, year, axle position) for specific fitment confirmation.
Test and Inspection
100% critical dimensions, runout and DTV inspection
Material physical and chemical inspection
Test shear strength, compressibility, density, flatness and parallelism
Test performance and noise/NVH
Catalogue
Certifications
