--- title: Why should I use a telescopic rear underrun protection device? description: Discover the benefits of foldable and telescopic rear underrun protection devices for improved road safety and regulatory compliance in commercial vehicles. image: https://blog.ringfeder-rf.com/hubfs/Ringfeder%20blog%20w11%20telescopic%20underrun%20protection%20meta.png --- [![RINGFEDER®](https://www.ringfeder-rf.com/img/ringfeder/ringfeder-logo-white.svg) ![RINGFEDER®](https://www.ringfeder-rf.com/img/ringfeder/ringfeder-logo-blue.svg)](https://www.ringfeder-rf.com/en/) - [Solutions](https://www.ringfeder-rf.com/en/solutions/) - Product - [Product knowledge](https://www.ringfeder-rf.com/en/product-knowledge/) - [Coupling](https://www.ringfeder-rf.com/en/products/coupling/) - [Underrun protection](https://www.ringfeder-rf.com/en/products/underrun-protection/) - [System solution](https://www.ringfeder-rf.com/en/products/system-solution/) - [Drawbar](https://www.ringfeder-rf.com/en/products/drawbar/) - 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These protective barriers at the rear of trucks, help reduce the risk of cars, motorcycles, and even pedestrians sliding underneath in a collision.   In this article, we will delve into a new type of Rear Underrun Protection Device (RUPD), the foldable and telescopic type.  ## When is it suitable to use a telescopic underrun protection?   Foldable and telescopic underrun protection is an adjustable RUPD to accommodate different swap body sizes.  For example, a vehicle may switch between swap bodies C745 and C782.  - *C745 = 7 450mm*  - *C782 = 7 820mm * *![Ringfeder blog w11 telescopic underrun protection](https://blog.ringfeder-rf.com/hs-fs/hubfs/Ringfeder%20blog%20w11%20telescopic%20underrun%20protection.png?width=1208&height=483&name=Ringfeder%20blog%20w11%20telescopic%20underrun%20protection.png)*   If the vehicle uses a RUPD designed for C745, it won’t ensure the correct rear overhang (<300mm) for C782. Conversely, if installed for C782, it would protrude when C745 is used, risking a collision at the loading ramp.  Our foldable and telescopic underrun protection, [RUF R919 T](https://www.ringfeder-rf.com/en/products/underrun-protection/foldable/ruf-r919-t---ringfeder-foldable-and-telescopic-underrun-protection-with-round-beam/?v=15991029), is an example of a RUP that enables you to adjust the length to comply with the UNECE R58.03 depending on the current body size.   ## What is UNECE regulation 58?  The international organization United Nations Economic Commission for Europe (UNECE) sets international vehicle safety standards. The UNECE regulation 58 (R58) applies specifically for underrun protection devices, ensuring effective barriers preventing underride collisions.  [The latest version, R58 revision 03](https://www.ringfeder-rf.com/contentassets/27396b11259d41e39d6f80fb01edf8f2/unece-regulation-58-revision-3-ringfeder-en.pdf), enforces stricter limits on longitudinal position, profile height, and ground clearance.  Compliance with the UNECE R58 is mandatory in many regions, making proper selection essential for legal adherence and road safety. However, selecting the right underrun protection isn’t just about meeting regulations; it’s about saving lives, improving vehicle improve road safety and ensuring long-term cost efficiency.  [RUF R919 T](https://www.ringfeder-rf.com/en/products/underrun-protection/foldable/ruf-r919-t---ringfeder-foldable-and-telescopic-underrun-protection-with-round-beam/?v=15991029) is a high-quality R58.03 certified underrun protection for vehicles that use different swap body sizes, ensuring an overhang of less than 300mm. The strong components and the system design are optimised for low weight, small space, and reliable operation while ensuring quick and easy mounting.     ### **Do you want to learn more?**  [![Technical data RUF R919 T](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/26577224/b5527148-8fb8-4390-aa93-e71da6af3c92.png)](https://hubspot-cta-redirect-eu1-prod.s3.amazonaws.com/cta/redirect/26577224/b5527148-8fb8-4390-aa93-e71da6af3c92) ![Kersten Grote](https://blog.ringfeder-rf.com/hs-fs/hubfs/Ringfeder/RF_blogauthors/Kersten_Grote_background_nufam.jpg?width=64&height=64&name=Kersten_Grote_background_nufam.jpg) [Kersten Grote](https://blog.ringfeder-rf.com/en/author/kersten-grote) He is a seasoned engineer with extensive expertise in the heavy commercial vehicle industry. His technical expertise lies in the product segments of coupling sensors, drawbars and A-frames, all of which are critical components that ensure the safety of truck and trailer combinations. 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Subscribe ### Keep updated on thoughts, facts and knowledge! ## Related ### [![Why is underrun protection such an important issue?](https://blog.ringfeder-rf.com/hs-fs/hubfs/Ringfeder/RF_Image/Ringfeder-rear-underrun-protection-device-featured.jpg?width=600&name=Ringfeder-rear-underrun-protection-device-featured.jpg) Underrun protection Why is underrun protection such an important issue?](https://blog.ringfeder-rf.com/en/why-is-underrun-protection-such-an-important-issue?hsLang=en) - ## Explore Ringfeder - [Solutions](https://www.ringfeder-rf.com/en/solutions/) - [Products](https://www.ringfeder-rf.com/en/product-knowledge/) - [FAQ](https://www.ringfeder-rf.com/en/support/faq/) - [Support](https://www.ringfeder-rf.com/en/support/) - [Find us](https://www.ringfeder-rf.com/en/support/find-us/) - ## How can we help you? - [I want to buy](https://www.ringfeder-rf.com/en/contact-us/request-to-buy/) - [I need spare parts](https://www.ringfeder-rf.com/en/contact-us/request-for-spare-parts/) - [I need technical support](https://www.ringfeder-rf.com/en/contact-us/i-want-technical-support/) - [Other questions](https://www.ringfeder-rf.com/en/contact-us/other-questions/) - Supplier information ## Follow us - - - [Combined Shape Created with Sketch.](https://www.youtube.com/@ringfedertrailercouplings) - VBG Group Truck Equipment GMBH | Girmesgath 5 | D-47803 Krefeld - [Privacy](https://www.ringfeder-rf.com/en/privacy/) - [Imprint](https://www.ringfeder-rf.com/en/imprint/) - [GTC](https://www.ringfeder-rf.com/siteassets/ringfeder/terms_of_sale_new.pdf) - Whistleblower - Cookie Policy [![VBG Logo](https://www.ringfeder-rf.com/img/vbg-group-logo.svg)](https://www.vbggroup.com) ## Global Sites ### Global Sites - [Deutsch](https://www.ringfeder-rf.com/de/) - [English](https://www.ringfeder-rf.com/en/) - [Español](https://www.ringfeder-rf.com/es/) - [Polski](https://www.ringfeder-rf.com/pl/) ### Regional Sites - [Australia](https://www.ringfeder-rf.com/en-au/) - Brasil [English](https://www.ringfeder-rf.com/en-br/) [Português](https://www.ringfeder-rf.com/pt-br/) - [New Zealand](https://www.ringfeder-rf.com/en-nz/) Looking for machine elements from RINGFEDER POWER TRANSMISSION? [Visit ringfeder.com](https://www.ringfeder.com/) ### Ringfeder Subscribe ```json { "@context" : "http://schema.org", "@type" : "Article", "articleBody" : "When it comes to road safety, underrun protection plays a crucial role in preventing accidents between large commercial vehicles and smaller road users. These protective barriers at the rear of trucks, help reduce the risk of cars, motorcycles, and even pedestrians sliding underneath in a collision. In this article, we will delve into a new type of Rear Underrun Protection Device (RUPD), the foldable and telescopic type. When is it suitable to use a telescopic underrun protection? Foldable and telescopic underrun protection is an adjustable RUPD to accommodate different swap body sizes. For example, a vehicle may switch between swap bodies C745 and C782. C745 = 7 450mm C782 = 7 820mm If the vehicle uses a RUPD designed for C745, it won’t ensure the correct rear overhang (<300mm) for C782. Conversely, if installed for C782, it would protrude when C745 is used, risking a collision at the loading ramp. Our foldable and telescopic underrun protection, RUF R919 T, is an example of a RUP that enables you to adjust the length to comply with the UNECE R58.03 depending on the current body size. What is UNECE regulation 58? The international organization United Nations Economic Commission for Europe (UNECE) sets international vehicle safety standards. The UNECE regulation 58 (R58) applies specifically for underrun protection devices, ensuring effective barriers preventing underride collisions. The latest version, R58 revision 03, enforces stricter limits on longitudinal position, profile height, and ground clearance. Compliance with the UNECE R58 is mandatory in many regions, making proper selection essential for legal adherence and road safety. However, selecting the right underrun protection isn’t just about meeting regulations; it’s about saving lives, improving vehicle improve road safety and ensuring long-term cost efficiency. RUF R919 T is a high-quality R58.03 certified underrun protection for vehicles that use different swap body sizes, ensuring an overhang of less than 300mm. The strong components and the system design are optimised for low weight, small space, and reliable operation while ensuring quick and easy mounting. Do you want to learn more?", "articleSection" : "Content creation", "author" : { "@type" : "Person", "name" : "Kersten Grote", "url" : "https://blog.ringfeder-rf.com/en/author/kersten-grote" }, "datePublished" : "2025-03-12", "headline" : "Why should I use a telescopic rear underrun protection device?", "image" : "https://info.ringfeder-rf.com/hubfs/Ringfeder%20blog%20w11%20telescopic%20underrun%20protection%20meta.png", "publisher" : { "@type" : "Organization", "name" : "VBG GROUP TRUCK EQUIPMENT GMBH" }, "url" : "https://blog.ringfeder-rf.com/en/why-should-i-use-a-telescopic-rear-underrun-protection-device" } ``` ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Kersten Grote", "url" : "https://blog.ringfeder-rf.com/en/author/kersten-grote" }, "dateModified" : "2025-03-12T15:00:00.713Z", "datePublished" : "2025-03-12T15:00:00.000Z", "headline" : "Why should I use a telescopic rear underrun protection device?", "image" : [ "https://blog.ringfeder-rf.com/hubfs/Ringfeder%20blog%20w11%20telescopic%20underrun%20protection%20meta.png" ], "mainEntityOfPage" : { "@id" : "https://blog.ringfeder-rf.com/en/why-should-i-use-a-telescopic-rear-underrun-protection-device", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.ringfeder-rf.com/hubfs/Ringfeder/Assets/ringfeder-inbound/img/ringfeder-logo-blue.svg" }, "name" : "Ringfeder" } } ```