Product overview
The Tsubaki Road Chainroll 520 RQR 55135200025-M is a high-performance 520-pitch road racing chain supplied on a roll for custom-length is part of Tsubaki's RQR series, developed exclusively for racing and proven on factory machines in leading championships such as World Superbike and the Isle of Man TT.
Main features
- Racing-only 520-pitch road chain from Tsubaki's RQR series, engineered specifically for competition use and top-level road racing.
- Very high rigidity and tensile strength combined with low weight to reduce drivetrain losses and sharpen throttle response under acceleration.
- Pre-stretched low-friction X-ring design to minimise initial elongation and maintain stable chain adjustment in demanding conditions.
- Supplied as a road chain roll, ideal for race teams and workshops that need to cut multiple custom-length 520 racing chains from one continuous length.
- Gold-coloured outer plates for a high-end appearance and added surface protection on exposed road-racing drivetrains.
Technical details
| Brand | Tsubaki |
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| Series | RQR road racing |
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| Product type | Motorcycle drive chain roll (road) |
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| Chain pitch | 520 (5/8" × 1/4" class) |
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| Construction | High-strength steel roller chain with lightened components |
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| Seal type | Low-friction X-ring sealed chain for reduced drag and extended service life |
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| Primary use | Road racing and high-performance track riding; racing-focused specification |
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| Colour | Gold outer plates |
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| Connection type | Designed for use with hollow-pin rivet master links commonly supplied with cut-to-length RQR 520 chains. |
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| Series positioning | Top-level racing chain above general road sport series in Tsubaki's range |
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Performance advantages
- Optimised for racing power levels: Built to handle the stresses of modern high-output engines used in international road-racing championships.
- Reduced rotational mass: 520-pitch specification helps lower unsprung and rotating weight at the rear wheel compared to heavier 525/530 setups, supporting faster acceleration and more responsive handling.
- Stable chain growth: Pre-stretching in production significantly reduces initial elongation, so the chain settles quickly into a stable adjustment range even under intensive use.
- Low-friction sealing: X-ring profile retains lubricant while minimising friction between plates and rollers, combining race performance with controlled wear.
- Race-proven reliability: The RQR series has been used successfully in World Superbike, national superbike series and road racing events, underlining its durability at the highest level.
Typical use cases
- Building 520 racing conversions for sportbikes originally equipped with heavier 525 or 530 chains.
- Preparing multiple chains with different sprocket ratios for circuit racing or track-day use from a single bulk chain roll.
- Equipping middleweight and litre-class road bikes where reduced drivetrain losses and precise power delivery are priorities.
- Supporting race-team workshop operations that require quick cutting and riveting of fresh 520 chains between sessions.
Selected compatibility examples
The 520 RQR chain specification is suitable for a wide range of road and sport motorcycles that use a 520-pitch drive chain when cut to the correct length and matched with appropriate 520 following table shows a selection of typical applications for this chain type:
| Brand | Model | Year |
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| Aprilia | RS 660 | 2020–2025 |
| BMW | G 310 R | 2017–2024 |
| Ducati | Monster 821 | 2014–2019 |
| Honda | CB 500 F | 2019–2021 |
| Kawasaki | Ninja 650 | 2020–2024 |
This selection illustrates the kind of middleweight and performance-oriented machines that typically use a 520-pitch road chain corresponding to the Tsubaki 520 RQR specification.
