Super X-Ring Motorcycle Chain 428SX 520-SX 525-SX 530-SX

A Super X-Ring motorcycle chain represents the top tier of sealed drive chain technology. It uses a uniquely shaped ring seal — wider in cross-section than a standard X-ring, with a triple-lip design that creates three distinct sealing contact surfaces per side rather than the two of a conventional X-ring. This geometry provides even better contamination exclusion in the most demanding conditions, further reduces seal-face friction relative to earlier X-ring designs, and extends the internal grease retention interval beyond what standard O-ring or conventional X-ring chains can match.

The SX designation in the chain number (428SX, 520-SX, 530-SX, etc.) identifies these chains as the Super X-ring sealed variant. All use solid-bore bushing construction — the same bushing type as our motocross and professional chain ranges. The 9-specification range runs from the 428SX (28.0 kN) through to the 530-SX at 43.0 kN — the highest break load in the Korea Ever-Power drive chain. These chains are targeted at high-performance motorcycles, heavy tourers operating in demanding environmental conditions, and riders who want the absolute minimum maintenance obligation from their drivetrain.

Note the difference between the H-grade SX variants (520H-5X, 525H-SX, 530H-5X) and the standard-grade SX variants (52055, 520-SX, 520-SX3, 525-SX, 530-SX) in the same pitch. H-grade SX chains use 2.40 mm plates and carry 38.0 kN tensile strength; the standard-grade SX equivalents in the same 520-pitch use 1.85–2.03 mm plates but achieve 30.5–36.0 kN through the optimised SX seal geometry and solid bushing. The 530-SX with 2.40 mm plates at 43.0 kN is the highest tensile strength chain in this range.

Chain No.	Pitch (mm)	Bush Type	Width (mm)	Pin Dia (mm)	Pin Length (mm)	Roller Dia (mm)	Plate T Inner (mm)	Plate T Outer (mm)	Tensile Strength (kN)	Weight (kg/m)
428SX	12.700	Solid	7.85	5.00	20.60	8.51	2.20	2.03	28.0	1.02
52055	15.875	Solid	6.35	5.34	19.20	10.18	1.85	1.85	30.5	0.91
520-SX	15.875	Solid	6.35	5.34	19.20	10.18	2.03	2.03	36.0	0.94
520-SX3	15.875	Solid	6.35	5.34	21.80	10.18	2.35	2.35	38.0	1.12
525-SX	15.875	Solid	7.94	5.50	22.80	10.20	2.35	2.35	40.0	1.12
530-SX	15.875	Solid	9.60	5.50	24.50	10.20	2.40	2.40	43.0	1.20
520H-5X	15.875	Solid	6.35	5.24	22.00	10.16	2.40	2.40	38.0	1.21
525H-SX	15.875	Solid	7.94	5.24	23.80	10.16	2.40	2.40	38.0	1.35
530H-5X	15.875	Solid	9.60	5.24	25.40	10.16	2.40	2.40	38.0	1.39

The Super X-ring is the fourth and highest tier in the sealed drive chain hierarchy. Understanding where it sits relative to the other three types helps clarify whether the additional cost is justified for a specific application — not every rider needs the top-grade option, and knowing why helps you make an informed selection rather than a marketing-driven one.

Feature	Standard	O-Ring	X-Ring	Super X-Ring
Seal cross-section	None	Round (O)	X-shape, 2 lips/side	Wider X, 3 lips/side
Sealing contact lines	0	1 per side	2 per side	3 per side
Internal lube retained?	No	Yes	Yes	Yes — highest retention
Seal friction (relative)	Lowest (no seal)	Moderate	Lower than O	Lowest among sealed types
Lube interval (typical)	300–500 km	600–1,000 km	800–1,200 km	1,000–1,500 km
Service life (vs standard)	1× (baseline)	~2–3×	~3–4×	~3–5× (brand claims up to 5×)
All-weather protection	Poor	Good	Very good	Best
Typical use case	Track / frequent-maintenance street	Mixed-condition street	Demanding street / off-road	High-performance, heavy touring, harsh environments

Super X-ring is not the right answer for every rider. If you clean and lube your chain every 400–500 km without fail and ride primarily on dry roads, the additional cost of an SX-grade chain over an O-ring chain is unlikely to pay back within one chain life. The SX grade earns its cost premium when maintenance intervals are longer, conditions are demanding, or the machine is high-powered enough that drivetrain friction losses are a real concern.

The cleaning protocol for Super X-ring chains is the same as for other sealed drive chains, with the same critical requirement: use only O-ring/X-ring-safe cleaning products. Despite the triple-lip seal's superior sealing performance, the NBR rubber is still susceptible to degradation from petroleum-based solvents — this applies regardless of how many sealing lips the ring has.

Avoid WD-40 as a chain lubricant on SX-grade sealed chains — it is not a lubricant and some formulations contain solvent carriers that degrade NBR rubber over repeated application. Use a dedicated chain lubricant every time.

The sprocket is the mechanical partner of the drive chain — the chain transmits rotational force from the engine's countershaft sprocket to the rear wheel sprocket, and both components wear together in the same service cycle. At the SX grade, where the chain itself is designed to outlast several standard chain replacement intervals, the condition of the sprockets at installation becomes more important. A Super X-ring chain paired with worn sprockets will not deliver the extended service life the SX grade is engineered to achieve — worn hook-shaped teeth shift load to the roller tips and side plates, dramatically accelerating the stretch rate of even the most capable sealed chain.

For high-performance applications using 520-SX, 525-SX, or 530-SX chains, consider steel sprockets as the default choice. Steel outlasts aluminium sprockets by a factor of 2–3 under equivalent conditions, and the weight difference between steel and aluminium rear sprockets is rarely more than 300–400 g — a difference that is not meaningful on a loaded touring machine or a large naked bike. Aluminium is worth specifying only for track machines where the total unsprung and rotating weight budget matters lap to lap.

For compatibility and fitment confirmation, our full sprocket range is available through chains-sprockets.com — select by pitch and tooth count, or contact us with the motorcycle model to confirm the correct specification before ordering.

Korea Ever-Power Motorcycle Chain Co., Ltd. is a professional transmission chain supplier with a manufacturing network spanning five production facilities and over 110,000 square metres of combined plant area. The SX-grade sealed chain is produced under ISO 9001 certified quality management with chain-specific controls: tensile batch testing, SX-ring compression verification at each joint before packing, articulation inspection for stiff links, and dimensional check against reference gauges for pitch and roller diameter.

We supply the full SX series across all nine specifications listed in the table above, and offer matching sprockets for all pitch sizes. Contact us directly for custom link counts, OEM part-number cross-reference confirmation, or wholesale pricing on workshop quantities.

What does "Super X-Ring" mean, and how does it differ from a standard X-ring chain?
The Super X-ring seal has a wider cross-section and a triple-lip design — three sealing contact lines per side instead of two. This increases contamination exclusion capability, reduces seal-face friction (by concentrating contact pressure on narrower lip ridges), and extends the internal grease retention interval beyond standard X-ring chains. The SX prefix in the chain number identifies this seal type.

Which SX-grade chain should I choose for a 600cc sport bike?
For a 600cc machine currently running a 520-pitch chain, either the 520-SX (36.0 kN, 0.94 kg/m) or 520-SX3 (38.0 kN, 1.12 kg/m) is appropriate. The 520-SX is lighter and better suited to performance-oriented street and occasional track use; the 520-SX3 adds heavier plates for sustained high-power or loaded touring use. Confirm the pitch from the existing chain number before ordering.

Can I install a 530-SX chain on a bike that currently has a 530H-O?
Yes. Both chains share the 15.875 mm pitch and 10.16–10.20 mm roller diameter, which means the 530-SX fits the same sprockets as the 530H-O. The 530-SX uses a different pin length and a wider SX-ring seal versus the O-ring, but neither dimension affects sprocket mesh or chain guide clearance.

Is the 530-SX at 43.0 kN meaningfully stronger than a 530H-O at 34.0 kN for a large touring bike?
The tensile strength difference (43.0 vs 34.0 kN) represents a theoretical safety margin rather than a daily working-load difference — neither chain approaches its break load under normal riding. The practical advantage of the 530-SX over the 530H-O is in its superior seal performance and extended maintenance intervals, not in structural capacity per se. For heavily loaded touring use in variable conditions, the SX seal's contamination resistance is the more relevant upgrade.

How do I know when the Super X-ring seals are starting to fail?
Visually inspect seals at each cleaning. Look for visible cracking of the rubber, asymmetric cross-section profile (seal appears flattened on one side), or grease tracking outside the seal face onto the outer plate. Any of these indicates the seal is no longer maintaining compression and the joint is beginning to behave as an unsealed link. Replace the chain if multiple joints show seal failure.

Choi Yeon-soo, High-Mileage Commuter, Seoul (February 2025)
"Covering about 18,000 km per year on my commuter bike. The 528-SX grade means I lube roughly every 1,200 km instead of every 400–500 km I was doing with a standard chain. That's a real time saving over a full riding year. Chain is still quiet and tight at 9,000 km."

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Park Sang-hyun, Adventure Tourer, South Korea (January 2025)
"The 525-SX at 40.0 kN handles the Africa Twin's loaded touring torque without any drama. Went through the full Korean rainy season without any rust or unusual stretch. Clean it every 1,000 km, lube after cleaning. Very happy with the service interval versus O-ring chains I used before."

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Kim Ju-ho, Performance Workshop Owner, Busan (March 2025)
"We spec 520-SX or 520-SX3 depending on engine output for tuned machines. The difference between the SX-grade seal and a standard X-ring is noticeable in wear-rate measurements at 5,000 km intervals — SX chains consistently show less elongation under equivalent conditions. For the performance segment, this is the chain we recommend."

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Seo Min-jun, Enduro Rider, North Gyeongsang Province (December 2024)
"Using the 428SX on my 250cc enduro bike. Compared to the O-ring sealed chain I used previously, the SX is clearly holding up better through sustained mud and water exposure. After two months of winter enduro training, the seals are intact and the chain measures within tolerance. Worth the price difference."

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Oh Ji-won, Motorcycle Parts Dealer, Incheon (November 2024)
"The SX series moves well with performance-oriented customers who research their chain choice before buying. Korea Ever-Power's quality on the SX grade is consistent — we've had no complaints about seal quality or dimensional accuracy in the last year's orders."