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DID 520 ERT3 Racing Chain for Sur Ron Ultra Bee


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Meet the Racing Chain for Sur Ron Ultra Bee, the premier selection for riders pursuing excellence. This chain serves as a seamless plug-and-play upgrade for your Ultra Bee OEM chain.

Engineered by D.I.D, a trailblazer in the chain industry, this non-sealed chain transcends the ordinary link. It stands as the unparalleled choice for riders who insist on nothing short of excellence.

Shipping and returns

We ship worldwide (batteries are limited to Europe). Products indicated as being in stock are shipped in less than 72 hours after you place the order. Our warehouse is located in France, so transport cost and time may vary depending on the delivery country.

Changing one’s mind is human. That’s why you have up to 30 days after the delivery of your order for a return. Just let us know and we will take care of all the details.


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We offer different payment methods to accommodate your preferences: Credit Cards, PayPal, Wire Transfer & Klarna.

Your order is automatically validated as soon as the payment is confirmed. In case of a return, your refund goes to the payment method used for the order.

Chain Length

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This exceptional chain is not just endorsed by powerhouse factory race teams like Monster Energy Kawasaki, Star Racing Yamaha, Honda HRC, Troy Lee Designs/Red Bull GasGas, Red Bull KTM, and Factory HEP Suzuki; it has proven itself as the undisputed champion on the track.

The ERT3 provides exceptional anti-shock performance and higher tensile strength compared to the previous generation, all the while maintaining the same weight. This means that your chain is more robust without having a higher rotating mass.

What sets the Sur Ron Ultra Bee Racing Chain apart? It’s not merely about sheer strength; it defies gravity with its weight ratio wizardry. This chain dominates not only the 250 class but extends its reign across various racing realms. The 520ERT3 transcends being a simple chain; it’s a bold statement. If you crave the power and precision that champions thrive on, your search concludes with the 520ERT3, where excellence seamlessly meets the throttle!

Compatibility and fitting

Chain length depends on the sprocket size you are using, here are the number of links you need for each sprocket size.

Sprocket size (tooth) Sur Ron Ultra Bee
46T (stock) 96 links
50T 98 links
52T 98 links
54T 102 links
58T 102 links
60T 104 links

Drop-in compatibility on all bikes using 520 chains (Sur Ron Ultra Bee & Storm Bee, Stark Varg…).

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