{"product_id":"g10-chrome-steel-bearing-balls-7-13-7-2mm","title":"G10 Ball Bearings Bike Hubs Cones Machinery Chrome Steel Bearing Ball 7.13-7.2mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eG10 Chrome Steel Bearing Balls — Precision-Ground for Bike Hubs, Cones \u0026amp; Industrial Machinery\u003c\/h2\u003e\n\u003cp\u003eWhen a worn cone or loose hub starts costing you ride quality or machine downtime, the root cause is almost always bearing balls that have drifted out of tolerance. Cyclists rebuilding wheel hubs, mechanics servicing bottom brackets, and engineers maintaining rotating assemblies all face the same challenge: finding G10 chrome steel bearing balls in the exact diameter they need — not the nearest standard size.\u003c\/p\u003e\n\u003cp\u003eThese G10 chrome steel bearing balls are manufactured to ABEC\/ISO G10 precision grade, with diameters spanning 7.13 mm to 7.2 mm (approximately 0.281\" to 0.283\") in 0.002 mm increments. Each ball is ground and lapped from through-hardened chrome steel (typically equivalent to 52100 alloy), delivering a surface finish and roundness tolerance consistent with G10 classification. Available in packs of 100, 200, 300, or 500 pieces to suit both single-repair and workshop-volume needs.\u003c\/p\u003e\n\u003cp\u003eTypical applications include bicycle rear hub cone replacement, front hub overhaul with loose-ball retainer systems, headset bearing refills, and light-to-medium industrial machinery bearing seats where a non-standard diameter is required. The fine diameter stepping makes these balls well-suited for precision shimming applications and for restoring clearance in worn bearing races without replacing the entire assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔧\u003c\/span\u003e Compatible with loose-ball bicycle hubs, cones, headsets, and open-race industrial bearing housings requiring 7.13–7.2 mm diameter balls. Verify your existing ball diameter with a micrometer before selecting a variant.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These G10 Chrome Steel Bearing Balls\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eG10 Precision Grade\u003c\/strong\u003e — Ground and lapped to G10 (ISO 3290) tolerance, ensuring consistent roundness and surface finish across every ball in the pack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003e0.002 mm Diameter Stepping\u003c\/strong\u003e — Fifteen distinct diameters from 7.13 mm to 7.2 mm let you match the exact replacement size your hub or bearing race requires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eThrough-Hardened Chrome Steel\u003c\/strong\u003e — Made from chrome steel alloy (52100-equivalent) with through-hardening for resistance to deformation under radial and axial load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🚲\u003c\/span\u003e \u003cstrong\u003eBicycle Hub \u0026amp; Cone Compatible\u003c\/strong\u003e — Sized for common loose-ball rear and front hubs, cone-and-cup systems, and headsets where standard retainer cages are not used.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Order 100, 200, 300, or 500 pieces per pack; larger quantities reduce per-unit cost for workshop or production use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e \u003cstrong\u003eIndustrial Machinery Applications\u003c\/strong\u003e — Suitable for light-to-medium duty open-race bearing seats in conveyors, spindles, and rotating fixtures where a non-catalog diameter is needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — G10 Chrome Steel Bearing Balls\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eChrome Steel (52100-equivalent alloy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrecision Grade\u003c\/th\u003e\n\u003ctd\u003eG10 (ISO 3290)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e7.13 mm – 7.2 mm (approx. 0.281\" – 0.283\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Increment\u003c\/th\u003e\n\u003ctd\u003e0.002 mm per step (15 sizes available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e100 \/ 200 \/ 300 \/ 500 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Application\u003c\/th\u003e\n\u003ctd\u003eBicycle hubs, cones, headsets, open-race industrial bearings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eStandard chrome steel; lubrication recommended for wet environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per pack)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I measure the correct ball diameter for my bicycle hub?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eUse a digital micrometer or ball gauge to measure one of the existing balls removed from your hub. Measure across the widest point and record to 0.01 mm accuracy. If the existing balls show wear flats or pitting, measure the cone race groove width as a cross-reference. Select the variant that matches your measured diameter exactly — do not round up or down, as even 0.002 mm affects bearing preload in a cone-and-cup system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does G10 precision grade mean, and why does it matter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eG10 refers to the ISO 3290 grade classification for ball bearings. It specifies maximum allowable deviation in diameter (typically ±0.25 µm for balls in this size range), sphericity, and surface roughness. For bicycle hubs and precision machinery, G10 balls provide consistent rolling contact, reduced vibration, and predictable preload — compared to lower-grade balls (G25, G100) which have wider tolerances and shorter service life under repeated load cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls suitable for wet or outdoor cycling conditions?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eChrome steel (52100-equivalent) offers moderate corrosion resistance but is not stainless. For hubs exposed to rain, mud, or salt, apply a quality bearing grease (lithium-complex or marine-grade) during installation and re-grease at regular service intervals. If your application requires inherent corrosion resistance without regreasing, consider stainless steel bearing balls instead — contact us to confirm availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these balls in industrial machinery, not just bicycles?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These G10 chrome steel balls are suitable for light-to-medium duty open-race bearing seats in conveyors, spindles, rotary fixtures, and similar machinery where a non-standard diameter between 7.13 mm and 7.2 mm is required. For heavy-load or high-speed applications (above 3,000 RPM under significant radial load), verify the dynamic load rating of your bearing housing against the ball size and quantity before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy are there so many diameter options so close together?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBicycle hub manufacturers and industrial bearing designers often specify non-standard ball diameters to achieve a specific preload or clearance in their cone-and-cup geometry. A 0.002 mm difference in ball diameter can shift a hub from loose (excess play) to correctly preloaded to over-tight — all of which affect rolling resistance and bearing life. The 15-step range from 7.13 mm to 7.2 mm lets you dial in the exact fit rather than settling for the nearest available size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many balls do I need for a typical bicycle hub overhaul?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMost standard rear hubs use 9 balls per side (18 total), and front hubs typically use 10 balls per side (20 total). A 100-piece pack is sufficient for multiple hub overhauls. If you are servicing a fleet of bikes or running a workshop, the 300- or 500-piece packs offer a lower per-ball cost and ensure you have stock on hand for future rebuilds. Always replace all balls on both sides of a hub at the same time — mixing new and worn balls accelerates uneven wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these balls come pre-greased or dry?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese balls are supplied dry (ungreased). Apply your preferred bearing grease during installation. For bicycle hubs, a medium-viscosity lithium or synthetic grease works well. For industrial applications, match the grease specification to your operating temperature range and load conditions. Dry balls are easier to inspect for surface defects before installation and allow you to choose the grease best suited to your environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Diameter and Pack Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"7.13mm \/ 100 pcs","offer_id":52410222706962,"sku":"GYGYFSYXGZ00001x1","price":23.87,"currency_code":"USD","in_stock":true},{"title":"7.132mm \/ 100 pcs","offer_id":52410222739730,"sku":"GYGYFSYXGZ00002x1","price":23.87,"currency_code":"USD","in_stock":true},{"title":"7.134mm \/ 100 pcs","offer_id":52410222772498,"sku":"GYGYFSYXGZ00003x1","price":21.34,"currency_code":"USD","in_stock":true},{"title":"7.136mm \/ 100 pcs","offer_id":52410222805266,"sku":"GYGYFSYXGZ00004x1","price":21.34,"currency_code":"USD","in_stock":true},{"title":"7.138mm \/ 100 pcs","offer_id":52410222838034,"sku":"GYGYFSYXGZ00005x1","price":21.34,"currency_code":"USD","in_stock":true},{"title":"7.14mm \/ 100 pcs","offer_id":52410222870802,"sku":"GYGYFSYXGZ00006x1","price":21.83,"currency_code":"USD","in_stock":true},{"title":"7.142mm \/ 100 pcs","offer_id":52410222903570,"sku":"GYGYFSYXGZ00007x1","price":21.83,"currency_code":"USD","in_stock":true},{"title":"7.144mm \/ 100 pcs","offer_id":52410222936338,"sku":"GYGYFSYXGZ00008x1","price":17.26,"currency_code":"USD","in_stock":true},{"title":"7.146mm \/ 100 pcs","offer_id":52410222969106,"sku":"GYGYFSYXGZ00009x1","price":21.83,"currency_code":"USD","in_stock":true},{"title":"7.148mm \/ 100 pcs","offer_id":52410223001874,"sku":"GYGYFSYXGZ00010x1","price":21.83,"currency_code":"USD","in_stock":true},{"title":"7.15mm \/ 100 pcs","offer_id":52410223034642,"sku":"GYGYFSYXGZ00011x1","price":22.37,"currency_code":"USD","in_stock":true},{"title":"7.152mm \/ 100 pcs","offer_id":52410223067410,"sku":"GYGYFSYXGZ00012x1","price":22.37,"currency_code":"USD","in_stock":true},{"title":"7.154mm \/ 100 pcs","offer_id":52410223100178,"sku":"GYGYFSYXGZ00013x1","price":22.37,"currency_code":"USD","in_stock":true},{"title":"7.16mm \/ 100 pcs","offer_id":52410223132946,"sku":"GYGYFSYXGZ00014x1","price":24.87,"currency_code":"USD","in_stock":true},{"title":"7.2mm \/ 100 pcs","offer_id":52410223165714,"sku":"GYGYFSYXGZ00015x1","price":24.87,"currency_code":"USD","in_stock":true},{"title":"7.13mm \/ 200 pcs","offer_id":52410223198482,"sku":"GYGYFSYXGZ00001x2","price":46.5,"currency_code":"USD","in_stock":true},{"title":"7.132mm \/ 200 pcs","offer_id":52410223231250,"sku":"GYGYFSYXGZ00002x2","price":46.5,"currency_code":"USD","in_stock":true},{"title":"7.134mm \/ 200 pcs","offer_id":52410223264018,"sku":"GYGYFSYXGZ00003x2","price":41.33,"currency_code":"USD","in_stock":true},{"title":"7.136mm \/ 200 pcs","offer_id":52410223296786,"sku":"GYGYFSYXGZ00004x2","price":41.33,"currency_code":"USD","in_stock":true},{"title":"7.138mm \/ 200 pcs","offer_id":52410223329554,"sku":"GYGYFSYXGZ00005x2","price":41.33,"currency_code":"USD","in_stock":true},{"title":"7.14mm \/ 200 pcs","offer_id":52410223362322,"sku":"GYGYFSYXGZ00006x2","price":42.42,"currency_code":"USD","in_stock":true},{"title":"7.142mm \/ 200 pcs","offer_id":52410223395090,"sku":"GYGYFSYXGZ00007x2","price":42.42,"currency_code":"USD","in_stock":true},{"title":"7.144mm \/ 200 pcs","offer_id":52410223427858,"sku":"GYGYFSYXGZ00008x2","price":33.17,"currency_code":"USD","in_stock":true},{"title":"7.146mm \/ 200 pcs","offer_id":52410223460626,"sku":"GYGYFSYXGZ00009x2","price":42.42,"currency_code":"USD","in_stock":true},{"title":"7.148mm \/ 200 pcs","offer_id":52410223493394,"sku":"GYGYFSYXGZ00010x2","price":42.42,"currency_code":"USD","in_stock":true},{"title":"7.15mm \/ 200 pcs","offer_id":52410223526162,"sku":"GYGYFSYXGZ00011x2","price":43.37,"currency_code":"USD","in_stock":true},{"title":"7.152mm \/ 200 pcs","offer_id":52410223558930,"sku":"GYGYFSYXGZ00012x2","price":43.37,"currency_code":"USD","in_stock":true},{"title":"7.154mm \/ 200 pcs","offer_id":52410223591698,"sku":"GYGYFSYXGZ00013x2","price":43.37,"currency_code":"USD","in_stock":true},{"title":"7.16mm \/ 200 pcs","offer_id":52410223624466,"sku":"GYGYFSYXGZ00014x2","price":48.54,"currency_code":"USD","in_stock":true},{"title":"7.2mm \/ 200 pcs","offer_id":52410223657234,"sku":"GYGYFSYXGZ00015x2","price":48.54,"currency_code":"USD","in_stock":true},{"title":"7.13mm \/ 300 pcs","offer_id":52410223690002,"sku":"GYGYFSYXGZ00001x3","price":69.07,"currency_code":"USD","in_stock":true},{"title":"7.132mm \/ 300 pcs","offer_id":52410223722770,"sku":"GYGYFSYXGZ00002x3","price":69.07,"currency_code":"USD","in_stock":true},{"title":"7.134mm \/ 300 pcs","offer_id":52410223755538,"sku":"GYGYFSYXGZ00003x3","price":61.4,"currency_code":"USD","in_stock":true},{"title":"7.136mm \/ 300 pcs","offer_id":52410223788306,"sku":"GYGYFSYXGZ00004x3","price":61.4,"currency_code":"USD","in_stock":true},{"title":"7.138mm \/ 300 pcs","offer_id":52410223821074,"sku":"GYGYFSYXGZ00005x3","price":61.4,"currency_code":"USD","in_stock":true},{"title":"7.14mm \/ 300 pcs","offer_id":52410223853842,"sku":"GYGYFSYXGZ00006x3","price":62.95,"currency_code":"USD","in_stock":true},{"title":"7.142mm \/ 300 pcs","offer_id":52410223886610,"sku":"GYGYFSYXGZ00007x3","price":62.95,"currency_code":"USD","in_stock":true},{"title":"7.144mm \/ 300 pcs","offer_id":52410223919378,"sku":"GYGYFSYXGZ00008x3","price":49.16,"currency_code":"USD","in_stock":true},{"title":"7.146mm \/ 300 pcs","offer_id":52410223952146,"sku":"GYGYFSYXGZ00009x3","price":62.95,"currency_code":"USD","in_stock":true},{"title":"7.148mm \/ 300 pcs","offer_id":52410223984914,"sku":"GYGYFSYXGZ00010x3","price":62.95,"currency_code":"USD","in_stock":true},{"title":"7.15mm \/ 300 pcs","offer_id":52410224017682,"sku":"GYGYFSYXGZ00011x3","price":64.45,"currency_code":"USD","in_stock":true},{"title":"7.152mm \/ 300 pcs","offer_id":52410224050450,"sku":"GYGYFSYXGZ00012x3","price":64.45,"currency_code":"USD","in_stock":true},{"title":"7.154mm \/ 300 pcs","offer_id":52410224083218,"sku":"GYGYFSYXGZ00013x3","price":64.45,"currency_code":"USD","in_stock":true},{"title":"7.16mm \/ 300 pcs","offer_id":52410224115986,"sku":"GYGYFSYXGZ00014x3","price":72.15,"currency_code":"USD","in_stock":true},{"title":"7.2mm \/ 300 pcs","offer_id":52410224148754,"sku":"GYGYFSYXGZ00015x3","price":72.15,"currency_code":"USD","in_stock":true},{"title":"7.13mm \/ 500 pcs","offer_id":52410224181522,"sku":"GYGYFSYXGZ00001x5","price":114.23,"currency_code":"USD","in_stock":true},{"title":"7.132mm \/ 500 pcs","offer_id":52410224214290,"sku":"GYGYFSYXGZ00002x5","price":114.23,"currency_code":"USD","in_stock":true},{"title":"7.134mm \/ 500 pcs","offer_id":52410224247058,"sku":"GYGYFSYXGZ00003x5","price":101.52,"currency_code":"USD","in_stock":true},{"title":"7.136mm \/ 500 pcs","offer_id":52410224279826,"sku":"GYGYFSYXGZ00004x5","price":101.52,"currency_code":"USD","in_stock":true},{"title":"7.138mm \/ 500 pcs","offer_id":52410224312594,"sku":"GYGYFSYXGZ00005x5","price":101.52,"currency_code":"USD","in_stock":true},{"title":"7.14mm \/ 500 pcs","offer_id":52410224345362,"sku":"GYGYFSYXGZ00006x5","price":104.03,"currency_code":"USD","in_stock":true},{"title":"7.142mm \/ 500 pcs","offer_id":52410224378130,"sku":"GYGYFSYXGZ00007x5","price":104.03,"currency_code":"USD","in_stock":true},{"title":"7.144mm \/ 500 pcs","offer_id":52410224410898,"sku":"GYGYFSYXGZ00008x5","price":81.12,"currency_code":"USD","in_stock":true},{"title":"7.146mm \/ 500 pcs","offer_id":52410224443666,"sku":"GYGYFSYXGZ00009x5","price":104.03,"currency_code":"USD","in_stock":true},{"title":"7.148mm \/ 500 pcs","offer_id":52410224476434,"sku":"GYGYFSYXGZ00010x5","price":104.03,"currency_code":"USD","in_stock":true},{"title":"7.15mm \/ 500 pcs","offer_id":52410224509202,"sku":"GYGYFSYXGZ00011x5","price":106.61,"currency_code":"USD","in_stock":true},{"title":"7.152mm \/ 500 pcs","offer_id":52410224541970,"sku":"GYGYFSYXGZ00012x5","price":106.61,"currency_code":"USD","in_stock":true},{"title":"7.154mm \/ 500 pcs","offer_id":52410224574738,"sku":"GYGYFSYXGZ00013x5","price":106.61,"currency_code":"USD","in_stock":true},{"title":"7.16mm \/ 500 pcs","offer_id":52410224607506,"sku":"GYGYFSYXGZ00014x5","price":119.34,"currency_code":"USD","in_stock":true},{"title":"7.2mm \/ 500 pcs","offer_id":52410224640274,"sku":"GYGYFSYXGZ00015x5","price":119.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture4of6_2a330e0b-15e8-4a8d-97cb-044db2e6a05a.jpg?v=1782390945","url":"https:\/\/homediyer.com\/products\/g10-chrome-steel-bearing-balls-7-13-7-2mm","provider":"HomeDIYer","version":"1.0","type":"link"}