{"product_id":"enduro-bearings-mr-21531-2rs-abec-3-sealed-bearing-21-5x31x7mm-for-cycling-hubs","title":"Enduro Bearings MR 21531 2RS ABEC 3 Sealed Bearing 21.5x31x7mm for Cycling Hubs","description":"\u003cp\u003eEnduro Bearings MR 21531 2RS - ABEC 3 delivers reliable and enhanced performance for cycling enthusiasts seeking a durable upgrade. Engineered with hardened chromium steel races and balls, along with resilient riveted steel retainers, these bearings ensure long-lasting smoothness and resistance to wear. Designed as a cost-effective improvement over standard ABEC 1 bearings, they provide greater precision and efficiency for your hubs and bottom brackets.\u003c\/p\u003e\n\n\u003cp\u003eWith sealed 2RS protection and premium Mobile HP 222 grease, these bearings are well-equipped to withstand harsh conditions, keeping dirt and moisture out while maintaining optimal lubrication. Their dimensions of 21.5 x 31 x 7mm fit perfectly in a variety of cycling components, making them a versatile choice for upgrading your wheels and spares.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eImproving bearing precision and performance over standard ABEC 1 models\u003c\/li\u003e\n  \u003cli\u003eEnhancing durability with hardened chromium steel components\u003c\/li\u003e\n  \u003cli\u003eProviding reliable protection against contaminants with 2RS seals\u003c\/li\u003e\n  \u003cli\u003eEnsuring smooth operation in hubs and bottom brackets\u003c\/li\u003e\n  \u003cli\u003eOffering a cost-effective upgrade for cycling components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eApplications requiring higher ABEC ratings for ultra-high precision\u003c\/li\u003e\n  \u003cli\u003eUse outside of recommended dimensions (21.5 x 31 x 7mm)\u003c\/li\u003e\n  \u003cli\u003eEnvironments without proper maintenance or lubrication\u003c\/li\u003e\n  \u003cli\u003eComponents incompatible with sealed bearing types\u003c\/li\u003e\n  \u003cli\u003eExtreme load conditions beyond standard cycling use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bearings compatible with all types of bikes?\u003c\/strong\u003e\u003cbr\u003eThey are designed primarily for hubs and bottom brackets and fit components matching their dimensions, but compatibility should be verified with your specific bike model.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the 2RS seal mean?\u003c\/strong\u003e\u003cbr\u003e2RS indicates the bearing has two rubber seals, which protect against dirt and moisture, enhancing durability and reducing maintenance needs.\u003c\/p\u003e","brand":"Enduro Bearings","offers":[{"title":"Default Title","offer_id":45478802227375,"sku":"eb8110","price":11.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1525172926-03235900.jpg?v=1768523227","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/enduro-bearings-mr-21531-2rs-abec-3-sealed-bearing-21-5x31x7mm-for-cycling-hubs","provider":"Swinnerton Cycles","version":"1.0","type":"link"}