{"product_id":"4pcs-air-spring-bag-fits-peterbilt-trucks-durable-replacement","title":"4Pcs Air Spring Bag Fits Peterbilt Trucks - Durable Replacement","description":"\u003cp\u003eIn this review the author looks at the 4Pcs Air Spring Bag designed as a direct replacement for Peterbilt trucks, aimed at drivers needing reliable air suspension repairs. The bottom line: this kit is for fleet owners and truck technicians who want a heavy-duty, OEM-style replacement that improves load balancing and reduces vibration. The reviewer found its construction-4.5-5.00mm high density rubber with reinforced 4140 grade steel studs-gives a solid balance of durability and service life compared with basic replacement bags.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect fit compatibility:\u003c\/strong\u003e Fits multiple OEM references including 02456, 04759 and 06746, making it straightforward to match on many Peterbilt applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable material:\u003c\/strong\u003e Constructed from 4.5-5.00mm thick high density rubber to resist wear and exceed common OEM thickness expectations for longer life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforced studs:\u003c\/strong\u003e Uses 25% stronger 4140 grade steel studs to improve mounting integrity under heavy loads and reduce the chance of stud failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured dimensions:\u003c\/strong\u003e With a top plate width of 9 in and piston width of 9.5 in, the bag fits the expected envelope for specified Peterbilt suspension locations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRide and stability benefit:\u003c\/strong\u003e Air suspension design provides improved load balancing and reduces impact and vibration for safer, more comfortable operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty support:\u003c\/strong\u003e Backed by a 3 year unlimited-mileage quality guarantee, giving confidence for fleet use and long-term service planning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis replacement set is best for Peterbilt owners, fleet maintenance crews, and independent heavy-truck mechanics who need a robust, OEM-compatible air spring bag. The product suits trucks using the referenced part fits such as AS-8312, AS-8577, AS8813 and equivalent codes where straightforward fitment and durability are priorities.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for drivers seeking a bespoke suspension tune or for very light-duty commercial vehicles where a simpler, lower-cost solution would suffice; likewise, buyers should confirm the specific fit numbers against their truck before purchase to ensure compatibility.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh density rubber construction improves longevity under heavy use.\u003c\/li\u003e\n\u003cli\u003eReinforced 4140 grade steel studs reduce risk of hardware failure.\u003c\/li\u003e\n\u003cli\u003eClear dimensional specs (extended height 18 in, compressed 7.5 in) aid fit verification and installation planning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot a universal fit; buyers must confirm match to listed fit numbers and vehicle models.\u003c\/li\u003e\n\u003cli\u003eHeavier or more advanced aftermarket suspension options may offer different ride tuning features.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Plate Width\u003c\/td\u003e\n\u003ctd\u003e9 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Width\u003c\/td\u003e\n\u003ctd\u003e9.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtended Height\u003c\/td\u003e\n\u003ctd\u003e18 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompressed Height\u003c\/td\u003e\n\u003ctd\u003e7.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e13.40 lbs (per bag)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e4.5-5.00mm high density rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e3 year unlimited-mileage quality guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 4Pcs Air Spring Bag kit is a sensible choice for anyone maintaining Peterbilt air suspension who needs a durable, OEM-style replacement with clear dimensions and strong hardware. It delivers solid value through reinforced construction and a three-year warranty, making it a dependable option for fleet upkeep and long-haul service where reduced vibration and improved load balancing matter.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these air spring bags fit my Peterbilt?\u003c\/strong\u003e\u003cbr\u003eThey fit models that match the listed reference numbers (for example 02456, 04759, 06746 and equivalents); confirm your truck's part reference before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat material and hardware improvements are included?\u003c\/strong\u003e\u003cbr\u003eEach bag uses 4.5-5.00mm high density rubber and is reinforced with 4140 grade steel studs that are stated to be 25% stronger than typical studs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat warranty is offered?\u003c\/strong\u003e\u003cbr\u003eThe product comes with a 3 year unlimited-mileage quality guarantee and the seller invites contact for any questions.\u003c\/p\u003e","brand":"STILEALUS","offers":[{"title":"Default Title","offer_id":48196103897307,"sku":"B0F8BR8TMN","price":265.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71jiP3el3QL._AC_SL1500.jpg?v=1770367647","url":"https:\/\/gearmusthave.com\/products\/4pcs-air-spring-bag-fits-peterbilt-trucks-durable-replacement","provider":"GearMustHave","version":"1.0","type":"link"}