{"product_id":"timbren-gmrs15-ses-rear-suspension-enhancement-system-8-600-lb-load-support-progressive-rubber-spring","title":"Timbren GMRS15 SES Rear Suspension Enhancement System - 8,600 lb Load Support, Progressive Rubber Spring","description":"\u003cp\u003e\u003cstrong\u003eThe Timbren GMRS15 SES Rear Suspension Enhancement System is a bolt-on, maintenance-free rubber auxiliary spring kit that adds up to 8,600 lb of load support and noticeably reduces sag, roll, and sway when hauling or towing.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for heavy-duty truck owners who tow regular loads or carry payloads that push factory suspension to its limits, this Timbren SES kit uses a progressive rubber spring to engage as weight increases. It mounts to existing factory points using included hardware and requires no air lines, compressors, or ongoing upkeep. The result is steadier handling, improved braking response under load, and a smoother ride without the complexity of air systems.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the GMRS15 SES improve ride quality when towing?\u003c\/h3\u003e\n\u003cp\u003eAs you add cargo or hook up a trailer, the auxiliary rubber spring compresses progressively to support extra weight and limit excessive bounce. That means less bottoming out and a more controlled chassis during acceleration, braking, and cornering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProgressive load curve: engages only as needed for comfort and control.\u003c\/li\u003e\n  \u003cli\u003eDampens road shock to reduce bouncing and vibration.\u003c\/li\u003e\n  \u003cli\u003eHelps maintain factory suspension geometry for better steering feel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this system eliminate sag and improve handling under heavy loads?\u003c\/h3\u003e\n\u003cp\u003eThe GMRS15 is engineered to reduce rear-end sag and restore a level stance when carrying substantial weight. By supporting up to 8,600 lb of load, it helps the truck maintain ride height, improving braking stability and reducing trailer sway tendencies caused by excessive rear drop.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReduces rear sag for improved headlight aim and towing alignment.\u003c\/li\u003e\n  \u003cli\u003eImproves braking stability by keeping suspension within optimal travel.\u003c\/li\u003e\n  \u003cli\u003eMinimizes body roll for safer cornering under load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance or upkeep does the Timbren SES require?\u003c\/h3\u003e\n\u003cp\u003eOne of the standout benefits is zero routine maintenance: no air springs, hoses, or compressors that can leak or fail over time. Built from durable rubber compounds, the kit is designed to withstand temperature extremes and regular use without scheduled servicing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNo air system components to inspect or replace.\u003c\/li\u003e\n  \u003cli\u003eDurable construction resists abrasion and weathering.\u003c\/li\u003e\n  \u003cli\u003eInstalled once; performs reliably for years under normal conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation — can I do it myself?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone comfortable with basic tools and working under a truck. The kit mounts to factory attachment points with the supplied hardware; most owners complete both sides in under an hour without drilling or modifications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMounts to existing frame points — no drilling required in most applications.\u003c\/li\u003e\n  \u003cli\u003eIncludes all mounting hardware and clear instructions for DIY fits.\u003c\/li\u003e\n  \u003cli\u003eTypical install time: often under 60 minutes per side for a single installer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The Timbren GMRS15 SES is aimed at heavy-duty truck drivers who frequently tow trailers, haul heavy payloads, or want a simple, long-lasting way to stabilize their rear suspension without the complexity of air systems. It’s ideal for fleet vehicles, contractors, recreational haulers, and anyone seeking improved control and confidence while loaded — especially those who prefer a one-time installation and hands-off durability.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the GMRS15 require periodic maintenance?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — the system is maintenance-free with no air lines or compressors to service.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will installing the GMRS15 change my factory ride unloaded?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No significant change when unloaded; the rubber spring engages progressively as load increases.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Timbren","offers":[{"title":"Default Title","offer_id":67585450803385,"sku":"B0B3WDNN75","price":583.24,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/timbren-gmrs15-ses-assembly-closeup.jpg?v=1790470698","url":"https:\/\/redleafauto.ca\/products\/timbren-gmrs15-ses-rear-suspension-enhancement-system-8-600-lb-load-support-progressive-rubber-spring","provider":"Redleaf Auto","version":"1.0","type":"link"}