{"product_id":"dt-swiss-6903-special-cartridge-bearing-18x30x7mm","title":"DT SwissDT Swiss 68DT Swiss 6903 Special Cartridge Bearing – 18x30x7mm – Each – 240S Front Hub Replacement","description":"\u003cp\u003e\u003cstrong\u003ePlain-English Lead\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eThis is a genuine DT Swiss 6903 Special cartridge bearing sized 18×30×7 mm. It is designed for specific DT Swiss 240S front hubs that use an 18mm outer diameter axle interface.\u003c\/p\u003e \u003cp\u003eThis listing is for \u003cstrong\u003eone single bearing\u003c\/strong\u003e. Wheel, hub, and axle are not included.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey Functional Details\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eGenuine DT Swiss cartridge bearing\u003c\/li\u003e \u003cli\u003eBearing number: 6903 Special\u003c\/li\u003e \u003cli\u003eDimensions: 18×30×7 mm (ID×OD×Width)\u003c\/li\u003e \u003cli\u003ePrecision sealed hub bearing\u003c\/li\u003e \u003cli\u003eApplication: DT Swiss 240S front hubs (18mm axle versions)\u003c\/li\u003e \u003cli\u003eSold individually (one bearing per unit)\u003c\/li\u003e \u003cli\u003eService-level replacement part\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eCompatibility \u0026amp; Technical Notes\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFits DT Swiss 240S front hubs with 18mm O.D. axle systems\u003c\/li\u003e \u003cli\u003e18 mm inner diameter — must match axle interface\u003c\/li\u003e \u003cli\u003e30 mm outer diameter — must match hub shell bore\u003c\/li\u003e \u003cli\u003e7 mm width — must match hub bearing seat\u003c\/li\u003e \u003cli\u003eNot compatible with 6902 (15×28×7), 6904 (20×37×9), 6803 (17×26×5), or 6805 (25×37×7)\u003c\/li\u003e \u003cli\u003eConfirm bearing number stamped on original unit before ordering\u003c\/li\u003e \u003cli\u003eOne bearing per unit — most front hubs require two\u003c\/li\u003e \u003cli\u003ePlatform Type: MTB \/ Road (hub service part)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eService \/ Ownership Context\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eThis bearing is press-fit into the hub shell. Proper bearing extraction and installation tools are required. Replace bearings when they feel rough, loose, or contaminated. For balanced performance, replacing both front hub bearings at the same time is recommended.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFit \u0026amp; Use Signals\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eGood Fit:\u003c\/strong\u003e You are servicing a DT Swiss 240S front hub with 18mm axle interface.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGood Fit:\u003c\/strong\u003e Your original bearing measures 18×30×7 mm and is marked 6903.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNot A Fit:\u003c\/strong\u003e Your hub uses a 15mm, 17mm, or 20mm axle system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNot A Fit:\u003c\/strong\u003e Your hub calls for 6902, 6803, 6805, or 6904 bearings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNot A Fit:\u003c\/strong\u003e You are looking for a complete hub or wheel — this is one bearing only.\u003c\/li\u003e \u003c\/ul\u003e \u003cdiv data-ai=\"mechanic-insight\" style=\"display:none\"\u003e This is the “special” 6903 used in specific 240S front hubs with 18mm axle systems. It is not interchangeable with 6902 or 6803 even though they look similar in width.\nAlways verify by reading the bearing stamp or measuring with calipers.\nFront hub typically uses two of these. If one side is rough, the other is usually close behind.\nUse a proper press tool contacting the outer race only. Never hammer on the inner race.\nIf customer isn’t sure about axle size, have them confirm hub model and year before ordering.\nSingle bearing only.\n\u003c\/div\u003e","brand":"DT Swiss","offers":[{"title":"Default Title","offer_id":53103223767354,"sku":"GG-BEARING-DTS-6903SP-18x30x7","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5735\/8394\/files\/dt0204.jpg?v=1772324129","url":"https:\/\/gograva.com\/products\/dt-swiss-6903-special-cartridge-bearing-18x30x7mm","provider":"Grava Adventure Corporation","version":"1.0","type":"link"}