{"product_id":"ksp-performance-1-5in-6x139-7-wheel-spacers-for-silverado-sierra-78-1mm-hubcentric-forged-6061-t6-aluminum","title":"KSP PERFORMANCE 1.5in 6x139.7 Wheel Spacers for Silverado\/Sierra — 78.1mm Hubcentric, Forged 6061-T6 Aluminium","description":"\u003cp\u003e\u003cstrong\u003eKSP 1.5-inch 6x139.7 hubcentric wheel spacers widen the track of Silverado\/Sierra and compatible GM trucks by 1.5 inches using forged 6061-T6 aluminum and OEM-grade hardware.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese wheel spacers are designed to bolt directly to 6x139.7 bolt-pattern GM trucks and SUVs (including Silverado, Sierra, Tahoe, Yukon, Suburban, Escalade, Avalanche, Express, and Savana models listed by year) to create extra clearance for larger wheels, a wider stance, or improved wheel fitment without modifying the hub. Each kit includes four forged spacers with a 78.1mm hub bore, M14x1.5 stud threads, and premium fasteners, plus a recommended torque spec for safe installation.\u003c\/p\u003e\n\n\u003ch3\u003eHow will these spacers affect fitment and clearance on my GMC\/Chevy truck?\u003c\/h3\u003e\n\u003cp\u003eAdding 1.5 inches per side pushes the wheel outward to provide extra clearance for wider tires, calipers, or aftermarket wheels that otherwise rub. Because these spacers are hub-centric with a 78.1mm bore, they center on the factory hub to reduce runout and vibration when installed correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBolt pattern: 6x5.5 (6x139.7 mm) compatible with listed GM models.\u003c\/li\u003e\n  \u003cli\u003eThickness: 1.5 inches — increases track width accordingly.\u003c\/li\u003e\n  \u003cli\u003eHub bore: 78.1 mm to match factory hub centering.\u003c\/li\u003e\n  \u003cli\u003eThread pitch: M14 x 1.5 compatible with OEM lug stud sizes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and manufacturing steps ensure strength and reliability?\u003c\/h3\u003e\n\u003cp\u003eKSP spacers are forged from 6061-T6 aircraft-grade aluminum and CNC-machined to precise tolerances, which offers superior strength over common cast pieces while maintaining lighter weight than many steel alternatives. Fasteners use ISO\/DIN 10.9–12.9 grade studs and heat-treated SCM435 bolts to resist shearing and fatigue under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: 6061-T6 forged aluminum for high strength-to-weight ratio.\u003c\/li\u003e\n  \u003cli\u003eCNC machining: accurate hole locations and uniform thickness.\u003c\/li\u003e\n  \u003cli\u003eCorrosion protection: black anodized finish to resist oxidation.\u003c\/li\u003e\n  \u003cli\u003eHardware: geomet-coated, high-grade studs and heat-treated bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install and torque these wheel spacers safely?\u003c\/h3\u003e\n\u003cp\u003eInstallation involves mounting the spacer to the hub with the supplied studs\/bolts, seating the spacer firmly, then mounting the wheel and torquing to the manufacturer-recommended spec. KSP advises a torque range to secure the parts and includes thread locker to help prevent loosening; verify wheel\/lug torque after the first 50–100 miles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended torque: 85–95 ft·lb for final wheel\/lug tightening.\u003c\/li\u003e\n  \u003cli\u003ePackage: four spacers per kit—one per wheel.\u003c\/li\u003e\n  \u003cli\u003eIncludes thread locker and adjusted stud length to aid installation.\u003c\/li\u003e\n  \u003cli\u003eTip: trim excessive stud length if it interferes with wheel fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these spacers affect handling or require other modifications?\u003c\/h3\u003e\n\u003cp\u003ePushing wheels outward changes scrub radius and track width, which can alter steering feel and load on suspension components. For a 1.5-inch spacer, most trucks in the listed range tolerate the change without additional modifications, but inspect suspension, bearings, and wheel bearings periodically and consult a professional for alignment after installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTrack increase: 1.5 inches per side — wider stance benefits stability in many use cases.\u003c\/li\u003e\n  \u003cli\u003eSuspension: monitor for extra load on wheel bearings and tie rods.\u003c\/li\u003e\n  \u003cli\u003eAlignment: recommended after installation to restore correct toe\/camber.\u003c\/li\u003e\n  \u003cli\u003eCompatibility check: verify stud thread pitch and hub bore match your vehicle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers who own compatible Chevrolet or GMC trucks and SUVs and want a durable, precisely machined 1.5-inch wheel spacer to clear larger wheels or improve stance without hub modification. These spacers suit owners who prefer forged aluminum components, OEM-style hub-centric fitment, and hardened hardware for road and light off-road use, plus anyone seeking a reversible upgrade supported by a 30-day refund and 12-month replacement policy from KSP PERFORMANCE.\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: Will these spacers fit my 2015 Silverado 1500?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the 6x139.7 bolt pattern, 78.1mm hub bore, and M14x1.5 threads are compatible with 2015 Silverado 1500 models listed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these spacers include all required hardware?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — each kit includes four forged spacers, geomet studs\/bolts, and thread locker; torque to 85–95 ft·lb after installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KSP PERFORMANCE","offers":[{"title":"Default Title","offer_id":55161310216535,"sku":"B0976SKXC5","price":192.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/ksp-front-view-spacer-kit.jpg?v=1790324541","url":"https:\/\/britishgarage.co.uk\/products\/ksp-performance-1-5in-6x139-7-wheel-spacers-for-silverado-sierra-78-1mm-hubcentric-forged-6061-t6-aluminum","provider":"British Garage","version":"1.0","type":"link"}