The facts.
| Chain pitch | 525 |
|---|---|
| Number of links | 110 - 120 (choice at order) |
| Weight (kg/100 links) | 2,08 kg |
| Relative service life (per 100 links) | 4000 |
| Seal type | NX-Ring |
| Application | Road |
| Colour | Gold/Gold |
| Master link | Rivet link |
| Chain type (EK) | SPR/3D |
| Manufacturer | EK Chain |
DescriptionThe whole story▼
When tensile strength and long-term reliability are non-negotiable, the EK 525 SPR/3D NX-Ring chain in Gold/Gold stands in a class of its own. Rated at an exceptional 48 kN (10,790 lbs) breaking load and engineered specifically for high-output road motorcycles, this chain is built to handle the demands of modern supersport, naked, and litre-class machines without compromise.
Key Features
- Exceptional tensile strength of 48 kN (10,790 lbs) for maximum safety under high engine output and hard acceleration
- NX-Ring seal technology delivers a relative service life rating of 4000, far outlasting conventional sealed chains
- SPR/3D construction reinforces the link plates in three dimensions, maintaining structural integrity under sustained high loads
- Gold/Gold finish provides a premium aesthetic and adds a corrosion-resistant layer against road grime and moisture
- Supplied open with a rivet link for the most secure, permanent connection — the preferred choice for high-performance applications
- Available in 110 or 120 links to suit a wide range of 525-pitch drivetrain configurations
NX-Ring Technology and Why It Matters
EK's NX-Ring seal sits between the inner and outer plates of every link, retaining grease around the pin and bush even under continuous high-speed running. Compared to standard O-ring chains, the NX-Ring geometry reduces friction contact area, which means less drag transmitted to the rear wheel, cooler operating temperatures, and dramatically extended wear life. The relative service life rating of 4000 reflects this — a figure that places the SPR/3D firmly at the top of EK's road chain hierarchy.
SPR/3D Construction
The SPR/3D designation refers to EK's three-dimensional plate-forming process, in which the side plates are shaped to carry tensile and compressive loads more evenly across the entire link. The result is a chain that resists elongation and fatigue cracking even when subjected to the sharp torque pulses and repeated hard acceleration runs typical of modern inline-four and V-twin superbikes. At 2.08 kg per 100 links, the weight-to-strength ratio remains competitive for a road-spec chain of this calibre.
Gold/Gold Finish
The full Gold/Gold treatment covers both inner and outer plates as well as the pins, giving the chain a consistent and distinctive appearance on the bike. Beyond aesthetics, the coating acts as an additional barrier against surface oxidation and the chemical attack from road salts and cleaning products, helping the chain look and perform well throughout its service life.
Open Chain with Rivet Link
This chain is supplied in open form with a rivet link rather than a clip-type master link. A properly peened rivet link matches the tensile strength of the chain itself and eliminates any risk of the side plate dislodging under load — a critical safety advantage on machines producing substantial torque. Fitting requires a quality chain tool capable of pressing and peening the rivet link correctly.
Fitment and Compatibility
The EK 525 SPR/3D NX-Ring chain is suited to any motorcycle running a 525-pitch drivetrain. Compatible models include, but are not limited to:
- Aprilia RSV4, RSV4 R, RSV4 RR, RSV4 RF, RSV4 1100, RSV4 1100 Factory, RS 660, RS 457
- BMW S1000RR, M1000RR, HP4, HP4R
- Bimota KB998 Rimini
- CFMOTO, QJMotor, SKR 800 RR
- Ducati 848, 899, 959, 1199, 1199 R, 1199 S, 1299, 1299 S, V2, V4, V4 R, V4 S
- Honda CBR 600 RR, CBR 1000 RR, CBR 1000 RR-R
- KTM RC 390, RC8 1190, 990 RC R
- Kawasaki ZX-4 RR, ZX-6R, ZX-10 R, ZX-10 RR, Ninja 400
- MV Agusta F3, F4, 675 SR-R, 990 RC R
- Suzuki GSX-R 600, GSX-R 750, GSX-R 1000
- Triumph Daytona 675, Daytona 675 R, Daytona 765, Daytona 765 Moto 2, Street Triple 765 R, Street Triple 765 RS
- Yamaha R1, R1M, R3, R6, R7, R9
Always verify the correct link count and sprocket pairing for your specific model year before ordering.
Specifications
- Chain pitch: 525
- Number of links: 110 or 120 (choice at order)
- Weight: 2.08 kg per 100 links
- Relative service life (per 100 links): 4000
- Seal type: NX-Ring
- Application: road
- Colour: Gold/Gold
- Master link type: rivet link
- Chain type: SPR/3D
- Manufacturer: EK Chain
What's includedEverything in the box▼
- 1x Chain
FitmentWhich bikes this fits▼
Universal product — Please check whether it fits your bike.
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