--- product_id: 10777398 title: "RK Racing Chain BB520XSO-120 Blue/Steel 120 Link X Ring Chain with Connecting Link" brand: "rk racing chain" price: "€ 272.20" currency: EUR in_stock: true category: "Rk Racing Chain" url: https://www.desertcart.hr/products/10777398-rk-racing-chain-bb520xso-120-blue-steel-120-link-x store_origin: HR region: Croatia --- # 30% longer wear life 8500 ft-lbs tensile strength Heat-treated hi-carbon alloy steel RK Racing Chain BB520XSO-120 Blue/Steel 120 Link X Ring Chain with Connecting Link **Brand:** rk racing chain **Price:** € 272.20 **Availability:** βœ… In Stock ## Summary > πŸ”— Ride Stronger, Last Longer β€” The Chain That Keeps Up With You ## Quick Answers - **What is this?** RK Racing Chain BB520XSO-120 Blue/Steel 120 Link X Ring Chain with Connecting Link by rk racing chain - **How much does it cost?** € 272.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/10777398-rk-racing-chain-bb520xso-120-blue-steel-120-link-x) ## Best For - rk racing chain enthusiasts ## Why This Product - Trusted rk racing chain brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Plug & Play Fit:** Includes rivet-type master link for quick, secure installationβ€”get riding faster. - β€’ **Next-Level Sealing:** Proprietary RX-Ring design with dual lubrication pools reduces friction and boosts performance. - β€’ **Unmatched Durability:** Heat-treated hi-carbon alloy steel ensures peak strength and longevity. - β€’ **Effortless Maintenance:** Seamless rollers and shouldered bushings minimize wear and extend chain life by 30%. - β€’ **Powerhouse Performance:** Rated for up to 750cc street and off-road bikes, handling 8500 ft-lbs tensile strength. ## Overview The RK Racing Chain BB520XSO-120 is a premium 120-link X-ring chain crafted from heat-treated hi-carbon alloy steel, delivering an impressive 8500 ft-lbs tensile strength. Featuring RK’s proprietary RX-Ring seal technology with dual lubrication pools, it reduces friction and extends wear life by 30% compared to standard O-ring chains. Designed for street and off-road bikes up to 750cc, it includes a rivet-type master link for easy installation and is backed by a 20,000-mile street riding warranty. ## Description As part of their continuing quality improvement program, the RK Chain Factory has made a running production upgrade to their best selling 520XSO chain. The new upgraded 520XSO chains feature heat treated hi-carbon alloy steel components with seamless rollers and shouldered bushings, and are fitted with RK's proprietary RX-Ring seal design. RK's new 520XSO chains offer quality, performance and unbeatable value, for all but the most demanding high performance application. RK's RX-ring chains feature an X-ring shaped seal. Viewed in cross-section, the X-ring has two lubrication pools and seal points versus the single seal point/pool design of a regular O-ring chain. RX-ring technology offers less torsional friction, increased high-stress performance, and a 30% longer wear life compared to standard O-ring chains. RK's new RX-ring chains offer tremendous value, plus true quality and performance for all but the most demanding high performance applications. Pin Length in mm: 19.9mm. Maximum Wear Life Index: 750. Maximum Tensile in lbs./Ft: 8500lbs/ft. Master link Type: Rivet. Weight in Lbs. per 100 Links: 3.36lbs. Max cc: 750cc Street/750cc Off-Road. 19.2 Links per foot. 15.875mm Pin to Pin center. Your original purchase of RK sealed-ring chain is warranted to be free of defects in material and workmanship for 20,000 miles of street riding or one-year of off-road use. There is absolutely no warranty of any kind for an RK Chain used in ANY racing competition. ## Features - 520XSO chains feature heat treated hi-carbon alloy steel components with seamless rollers and shouldered bushings, and are fitted with RK's proprietary RX-Ring seal design - 520XSO chains offer quality, performance and unbeatable value, for all but the most demanding high performance application - RX-ring technology offers less torsional friction, increased high-stress performance, and a 30% longer wear life compared to standard O-ring chains - Viewed in cross-section, the X-ring has two lubrication pools and seal points versus the single seal point/pool design of a regular O-ring chain - 520XSO has a maximum tensile strength rated at 8500 foot pounds and is suitable up to 750cc street bikes and 750cc off-road bikes, Includes Rivet Type Master Link ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01I9RTDPI | | Best Sellers Rank | #1,197,402 in Automotive ( See Top 100 in Automotive ) #1,083 in Powersports Drive Chains | | Brand Name | RK Racing Chain | | Customer Reviews | 4.6 4.6 out of 5 stars (785) | | Included Components | RK Racing Chain BB520XSO-120 Blue/Steel 120 Link X-Ring Chain with Connecting Link | | Item Length | 62.4 inches | | Item Type Name | RK Racing Chain BB520XSO-120 Blue/Steel 120 Link X-Ring Chain with Connecting Link | | Load Capacity | 8.5E+3 foot pounds | | Manufacturer | RK Racing Chain | | Material Type | Alloy Steel | | Model | BB520XSO-120 | | Part Number | BB520XSO-120 | | Recommended Uses For Product | Street, Off-road | | Specification Met | ANSI B29.1 | | Strand Type | Single | | Tensile Strength | 708 pounds_per_inch | | Unit Count | 120 Count | ## Product Details - **Brand:** RK Racing Chain - **Load Capacity:** 8.5E+3 foot pounds - **Material:** Alloy Steel - **Recommended Uses For Product:** Street, Off-road - **Specification Met:** ANSI B29.1 ## Images ![RK Racing Chain BB520XSO-120 Blue/Steel 120 Link X Ring Chain with Connecting Link - Image 1](https://m.media-amazon.com/images/I/61pCvEgMbPL.jpg) ## Available Options This product comes in different **Color, Size** options. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/10777398-rk-racing-chain-bb520xso-120-blue-steel-120-link-x](https://www.desertcart.hr/products/10777398-rk-racing-chain-bb520xso-120-blue-steel-120-link-x) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-23*