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RKC Sealed Ring Chain - RK Chain GB520XRU-100FT U-Ring - Gold
Standard off-the-shelf drive chains work fine for basic street commutes, but high-horsepower sportbikes, modified off-road builds, and racing teams push standard link pins past their structural limits. Under heavy acceleration, a weak drive chain stretches unevenly, robs horsepower from your rear wheel, and wears out your sprockets prematurely. If you manage a busy performance workshop, a race team, or a custom build garage, buying short, pre-cut chains is highly inefficient and drives up your overhead costs. The RKC Sealed Ring Chain system (Part Number: GB520XRU-100FT) completely solves this inventory and wear problem. This premium product gives you a massive, workshop-grade 100-foot bulk reel of RK’s legendary 520XRU gold chain, allowing you to custom-cut the exact link count required for any performance bike on your lift.What makes this 520XRU bulk spool the industry benchmark for sealed final drives is its specialized internal sealing tech. Unlike bulky, standard O-ring chains that create heavy mechanical drag and rob rear-wheel horsepower, RK utilizes their patented, ultra-thin "U-Ring" technology. These specialized seals take up minimal space between the inner and outer link plates, sealing in crucial factory grease while keeping horsepower-robbing mechanical friction down to an absolute minimum. The entire 100-foot strand features premium treated steel links finished in a brilliant, rich gold powder plating that resists salt, mud, and road grime while giving custom builds a striking, high-end look.Features and Benefits
Patented Ultra-Thin U-Ring Seals
The advanced U-ring configuration provides a highly effective seal to lock internal lubricant inside the chain pins while reducing mechanical drag. This thin-profile layout allows the chain to bend and spin freely, transferring maximum horsepower directly to the rear tire compared to thick, standard O-rings.Workshop-Grade 100-Foot Bulk Reel
This bulk-length spool provides a massive, continuous supply of premium 520 chain for professional garages and race teams. Buying in bulk completely eliminates the wasted links and high costs associated with purchasing single pre-cut boxed chains for every individual job.Superior Tensile Strength Heat Treatment
The inner link pins, bushings, and rollers undergo a specialized thermal carbon-alloy hardening process. This extreme heat treatment allows the chain to withstand violent torque shock loads without stretching, keeping your sprocket alignment perfectly true.Anti-Corrosion Gold Plating
The outer link plates are finished in a premium, multi-layered gold protective coating. This barrier prevents rust, surface scaling, and pitting when exposed to harsh track conditions, salt water, off-road mud, and high-pressure washing.Optimized Lightweight Plate Design
RK punches the link plates with precise geometric weight-reduction windows without reducing structural rigidity. This design lowers total rotating mass, allowing your engine to rev quicker and reducing the workload on your motorcycle's transmission.Vehicle Fitment Matrix
This 100-foot bulk drive chain roll uses standard 520 pitch spacing and is engineered to be custom-cut for the following powersports and motorcycle applications:| Chain Pitch Size | Roll Total Length | Common Vehicle Applications | Required Installation Tooling |
| 520 Pitch | 100 Feet (Continuous) | High-Performance Sportbikes, Dual-Sport, Motocross, and Custom Drag Racing Motorcycles (Up to 750cc displacements) | Requires a heavy-duty 520-series chain breaker, press-fit plate tool, and rivet tool. |
Technical Specifications
- Part Number: GB520XRU-100FT
- Chain Pitch: 520 Standard Spacing
- Total Length: 100 Feet (Continuous Spool)
- Seal Type: Patented Low-Friction U-Ring
- Chain Color: Premium Gold Outer Plates / Natural Steel Inner Links
- Maximum Displacement Rating: Recommended for street and off-road applications up to 750cc
- Packaging: Heavy-Duty Industrial Workshop Reel Storage Dispenser
Frequently Asked Questions (FAQ)
What is the practical performance advantage of a U-Ring chain over a standard O-Ring chain?
Standard O-ring chains use thick rubber rings that squash tightly between the metal plates. While this seals in grease, it creates a lot of tight physical friction that makes the chain harder to turn, wasting engine power. RK's patented U-ring is significantly thinner and shaped to seal perfectly with much less physical pressure. This gives you the long life and low maintenance of a sealed chain, but with the free-spinning, low-drag performance of an unsealed race chain.Does this 100-foot roll come with master links included in the box?
No, it does not. This is an industrial bulk workshop spool meant for fabrication shops, racing teams, and repair garages. Because every bike requires a different installation setup, the master links are sold separately. We highly recommend stocking up on genuine RK 520XRU rivet-style master links to match this roll so you can properly seal each custom-cut chain on your workbench.Can I safely use this 520XRU chain on a 1000cc liter-bike?
No, you should not use this chain for 1000cc setups. The 520XRU chain series is engineered and tensile-tested specifically for high-performance motorcycles up to a maximum engine displacement of 750cc. Putting a 750cc-rated 520 chain onto a high-torque 1000cc superbikes can cause the chain to stretch rapidly or fail under violent acceleration. For 1000cc sportbikes, you should look for heavier-duty chain series like the RK 530 or heavy-duty 520GXW series.Related products
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