{"product_id":"landrum-springs-spring-rear-5in-dia-x-15in-175lbs-k15-175-lank15-175","title":"Landrum Springs Spring Rear 5in Dia x 15in 175lbs K15-175","description":"\u003cp\u003e\u003cstrong\u003eLandrum Springs Spring Rear 5in Dia x 15in 175lbs K15-175\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLandrum Gold Series racing coil springs are high-performance linear-rate springs engineered for dirt and pavement circle track racing. Available for front and rear suspension applications in a wide range of sizes and spring rates, Gold Series springs combine high-tensile chrome-silicon steel, precision manufacturing and individual rate testing for consistent, predictable suspension performance.\u003c\/p\u003e\n\u003cp\u003eFor more than 25 years, Landrum Gold Series racing coil springs have been a trusted choice for racers who demand consistency, reliability, and winning results. Gold Series springs deliver the predictable and dependable response racers count on lap after lap.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhat Types of Race Cars Use Gold Series Racing Coil Springs?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eGold Series racing coil springs are primarily used in dirt and pavement circle track racing, with applications ranging from Modifieds and Late Models to Sportsman, Super Stocks, Street Stocks, Factory Stocks, Hobby Stocks, Pure Stocks and other stock-car and purpose-built racing classes.\u003c\/p\u003e\n\u003cp\u003eWhile circle track racing is the primary application, Gold Series springs are also used in road racing, autocross and other forms of motorsports where racers need a wide selection of spring diameters, free lengths and spring rates for front and rear suspension applications.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhat Makes Gold Series Racing Coil Springs Different?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eHigh-Tensile Chrome-Silicon Steel\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eGold Series racing coil springs are manufactured from USA-made high-tensile chrome-silicon alloy steel selected for strength, durability and consistent spring performance through repeated compression and extension cycles.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpring Engineering and Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eLandrum uses advanced spring-design software and proven engineering principles to develop Gold Series linear-rate springs that provide consistent, predictable performance throughout the spring’s working range. We also work closely with racers and chassis builders to design and produce springs that meet the specific requirements of their racing applications.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eIndividually Rate Tested\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEvery Gold Series racing coil spring is individually tested to verify its spring rate and is supplied with a dyno sheet documenting spring performance through compression.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eHow Are Gold Series Racing Coil Springs Tested?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eEach Gold Series racing coil spring is compressed through its working range and tested to verify that its actual spring rate is within ±2% of the specified rate. Testing measures the relationship between load and spring travel to confirm the spring performs at its intended linear rate.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhat Sizes and Spring Rates Are Available for Gold Series Racing Coil Springs?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eLandrum Gold Series racing coil springs are available in multiple diameters, free lengths and spring rates for front and rear suspension applications. Available Gold Series configurations include:\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eGold Series Front Racing Coil Springs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e5” OD Front Springs (8” Length): Rates from 400 lb.\/in to 1000 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Front Springs (9.5” Length): Rates from 400 lb.\/in to 1550 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5.5” OD Front Springs (8.5” Length): Rates from 400 lb.\/in to 1400 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5.5” OD Front Springs (9.5” Length): Rates from 400 lb.\/in to 1500 lb.\/in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGold Series Rear Racing Coil Springs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e5” OD Rear Springs (8” Length): Rates from 125 lb.\/in to 450 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Rear Springs (10.5” Length): Rates from 100 lb.\/in to 475 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Rear Springs (13” Length): Rates from 100 lb.\/in to 475 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Rear Springs (14” Length): Rates from 100 lb.\/in to 400 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Rear Springs (15” Length): Rates from 75 lb.\/in to 275 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Rear Springs (16” Length): Rates from 75 lb.\/in to 375 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Rear Springs (18” Length): Rates from 75 lb.\/in to 125 lb.\/in\u003c\/li\u003e\n\u003cli\u003e5” OD Rear Springs (20” Length): Rate of 100 lb.\/in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eHow Do You Find a Gold Series Racing Coil Spring?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eUse the Landrum Parts Finder to view available Gold Series racing coil springs by diameter, length and spring rate, or contact Landrum for additional product information.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eHow Does Stacking Racing Springs Affect Spring Rate?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eIn this video, we demonstrate how stacking two racing springs affects the combined spring rate. Using a scale and load cell, we show why two springs of the same rate produce a lower combined rate and explain the equation used to calculate stacked spring rate.\u003c\/p\u003e\n\u003cvideo\u003ehttps:\/\/landrumspring.com\/wp-content\/uploads\/2021\/11\/Stacked-Springs-Understanding-Combined-Spring-Rates-2.mp4\u003c\/video\u003e\n\n\u003cp\u003e{\u003cbr\u003e\n  “@context”: “https:\/\/schema.org”,\u003cbr\u003e\n  “@type”: “VideoObject”,\u003cbr\u003e\n  “name”: “Stacked Springs: Understanding Combined Spring Rates”,\u003cbr\u003e\n  “description”: “In this video, we demonstrate how stacking two springs of the same rate results in a combined spring rate that’s lower than the individual rates. Using a scale and load cell, we visually explain this concept and also break down the equation used to determine the stacked spring rate. Understanding this principle is crucial for fine-tuning suspension performance and achieving optimal handling.”,\u003cbr\u003e\n  “thumbnailUrl”: “https:\/\/landrumspring.com\/wp-content\/uploads\/2026\/06\/Stacked-Springs-Video-Thumbnail-300×168.jpg”,\u003cbr\u003e\n  “uploadDate”: “2025-03-20T00:00:00-04:00”,\u003cbr\u003e\n  “duration”: “PT1M18S”,\u003cbr\u003e\n  “contentUrl”: “https:\/\/landrumspring.com\/wp-content\/uploads\/2021\/11\/Stacked-Springs-Understanding-Combined-Spring-Rates-2.mp4”\u003cbr\u003e\n}\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Landrum Springs\u003c\/li\u003e\n\u003cli\u003ePart number: K15-175\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSold by MH Race Supply. Free ground shipping on orders of $250 or more.\u003c\/p\u003e","brand":"Landrum Springs","offers":[{"title":"Default Title","offer_id":68143942041879,"sku":"LANK15-175","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1036\/0789\/4295\/files\/BU0A1070-Edit-scaled_18f38a58-dd3d-495f-9898-a34cf604b9f1.jpg?v=1793286731","url":"https:\/\/mhracesupply.co\/products\/landrum-springs-spring-rear-5in-dia-x-15in-175lbs-k15-175-lank15-175","provider":"MH Race Supply","version":"1.0","type":"link"}