{"id":4781,"date":"2024-06-26T11:48:46","date_gmt":"2024-06-26T15:48:46","guid":{"rendered":"https:\/\/www.alcoawheels.com\/north-america\/en\/blogs\/\/"},"modified":"2024-07-31T12:52:45","modified_gmt":"2024-07-31T16:52:45","slug":"how-to-read-part-numbers","status":"publish","type":"post","link":"https:\/\/www.alcoawheels.com\/north-america\/en\/blogs\/how-to-read-part-numbers\/","title":{"rendered":"How to Read Part Numbers"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div>\n<h5 class=\"wp-block-heading\" id=\"h-understanding-the-alcoa-wheels-numbering-system\"><strong><strong><strong>Understanding The Alcoa\u00ae Wheels Numbering System<\/strong><\/strong><\/strong><\/h5>\n\n\n\t\t<div class=\"wp-block-alcoa-wheels-social-share-dynamic\">\n\t\t\t<div class=\"social-share-main\">\n\t\t\t\t<div class=\"social-share-item with-icon\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/themes\/alcoa-wheels\/assets\/src\/images\/facebook.svg\" alt=\"Facebook Icon\" \/>\n\t\t\t\t\t<a class=\"facebook\" title=\"Facebook Icon\" aria-label=\"Facebook\" href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?text=How%20to%20Read%20Part%20Numbers&#038;u=https:\/\/www.alcoawheels.com\/north-america\/en\/blogs\/how-to-read-part-numbers\/\" onclick=\"window.open(this.href, 'Facebook', 'width=897, height=795, scrollbars, resizable'); return false;\"><\/a>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"social-share-item with-icon\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/themes\/alcoa-wheels\/assets\/src\/images\/linkedin.svg\" alt=\"Linkedin Icon\" \/>\n\t\t\t\t\t<a class=\"linkedin\" title=\"LinkedIn Icon\" aria-label=\"Linkedin\" href=\"https:\/\/www.linkedin.com\/sharing\/share-offsite\/?url=https:\/\/www.alcoawheels.com\/north-america\/en\/blogs\/how-to-read-part-numbers\/\" onclick=\"window.open(this.href, 'LinkedIn', 'width=570, height=278, scrollbars, resizable'); return false;\"><\/a>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"social-share-item with-icon\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/themes\/alcoa-wheels\/assets\/src\/images\/x-twitter.svg\" alt=\"X Icon\" \/>\n\t\t\t\t\t<a class=\"twitter\" title=\"Tweet\" aria-label=\"X Icon\" href=\"https:\/\/twitter.com\/intent\/tweet?counturl=https:\/\/www.alcoawheels.com\/north-america\/en\/blogs\/how-to-read-part-numbers\/&#038;text=How%20to%20Read%20Part%20Numbers&#038;url=https:\/\/www.alcoawheels.com\/north-america\/en\/blogs\/how-to-read-part-numbers\/&#038;via=Howmet\" onclick=\"window.open(this.href, 'Twitter', 'width=570, height=278, scrollbars, resizable'); return false;\"><\/a>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"social-share-item with-icon\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/themes\/alcoa-wheels\/assets\/src\/images\/envelope.svg\" alt=\"Email Icon\" \/>\n\t\t\t\t\t<a class=\"email\" title=\"Email\" aria-label=\"Email Icon\" href=\"mailto:?subject=How%20to%20Read%20Part%20Numbers&#038;body=Understanding%20The%20Alcoa\u00ae%20Wheels%20Numbering%20System%20If%20you\u2019re%20trying%20to%20figure%20out%20how%20to%20read%20part%20numbers%20to%20spec%20the%20best%20wheels%20for%20your%20fleet%20or%20are%20just%20interested%20in%20knowing%20what%20all%20the%20digits%20and%20letters%20represent,%20this%20handy%20guide%20will%20help%20you%20do%20that.%20It%20will%20help%20you%20understand%20the%20structure%20of%20the%20%5B&hellip;%5D%0A%0Ahttps:\/\/www.alcoawheels.com\/north-america\/en\/blogs\/how-to-read-part-numbers\/\" target=\"_blank\"><\/a>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"social-share-item with-icon\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/themes\/alcoa-wheels\/assets\/src\/images\/print.svg\" alt=\"Print Icon\" \/>\n\t\t\t\t\t<a class=\"print\" title=\"Print\" aria-label=\"Print Icon\" href=\"#\" onclick=\"window.print();\"><\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\n\n<p>If you\u2019re trying to figure out how to read part numbers to spec the best wheels for your fleet or are just interested in knowing what all the digits and letters represent, this handy guide will help you do that.<\/p>\n\n\n\n<p>It will help you understand the structure of the Alcoa\u00ae Wheels numbering system and the distinction between the three components of each part number: wheel family, polish and surface treatment.<\/p>\n\n\n\n<p><strong>The Part Numbering System<\/strong><\/p>\n\n\n\n<p>The Alcoa\u00ae Wheels part numbering system gives the complete information for nearly all Alcoa\u00ae wheels available.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" height=\"535\" width=\"1024\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_2.jpg?w=1024\" alt=\"\" class=\"wp-image-4826\" srcset=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_2.jpg 1200w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_2.jpg?resize=300,157 300w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_2.jpg?resize=768,401 768w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_2.jpg?resize=1024,535 1024w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>The First Two Digits \u2013 Diameter &amp; Width<\/strong><\/p>\n\n\n\n<p>The first five digits of an Alcoa\u00ae Wheels part number indicate the wheel family identification. The first two digits of the wheel family number are straightforward:<\/p>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<ol class=\"wp-block-list\">\n<li>Diameter<\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p>(6) &#8211; 17.5\u201d<\/p>\n\n\n\n<p>(7) &#8211; 19.5\u201d<\/p>\n\n\n\n<p>(8) &#8211; 22.5\u201d<\/p>\n\n\n\n<p>(9) \u2013 24.5\u201d<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<ol class=\"wp-block-list\" start=\"2\">\n<li>Rim Width<\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p>(2) &#8211; 12.25\u201d,<\/p>\n\n\n\n<p>(3) &#8211; 13.00\u201d,<\/p>\n\n\n\n<p>(4) &#8211; 14\u201d<\/p>\n\n\n\n<p>(7) &#8211; 7.50\u201d<\/p>\n\n\n\n<p>(8) &#8211; 8.25\u201d<\/p>\n\n\n\n<p>(9) &#8211; 9.00\u201d<\/p>\n<\/div>\n<\/div>\n\n\n\n<p><strong>The Next Three Digits of the Wheel Family<\/strong><\/p>\n\n\n\n<p>Of the next three digits in the wheel family, the fourth one is the most meaningful:<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>Reserved for use by the engineering department (could include letters)<\/li>\n\n\n\n<li>Mounting system (most commonly a \u201c6\u201d for 10 on 285.75 hub pilot or a \u201c5\u201d for ISO 335)<\/li>\n\n\n\n<li>Reserved for use by the engineering department<\/li>\n<\/ol>\n\n\n\n<p>Each wheel family is designed for specific applications and vehicle types, ensuring that you get the right wheel for your needs. It\u2019s important to note that one wheel family typically has several part numbers.<\/p>\n\n\n\n<p><strong>The Sixth Digit \u2013 Polish Finish Options<\/strong><\/p>\n\n\n\n<p>Following the five digits of the wheel family is a single sixth digit, which is the polish finish identifier. Our polish options are designed to give your wheels the look you want while also offering added protection and longevity.<\/p>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p>Polish options include:<\/p>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p>1&nbsp;&nbsp;&nbsp;&nbsp; Mirror polish steer\/outside only<\/p>\n\n\n\n<p>2&nbsp;&nbsp;&nbsp;&nbsp; Mirror polish inside only<\/p>\n\n\n\n<p>3&nbsp;&nbsp;&nbsp;&nbsp; Mirror polish both sides<\/p>\n\n\n\n<p>7&nbsp;&nbsp;&nbsp;&nbsp; High Polish \u2013 both sides as applicable<\/p>\n\n\n\n<p>8&nbsp;&nbsp;&nbsp;&nbsp; High Polish \u2013 both sides as applicable. Reference data table for offset position.<\/p>\n\n\n\n<p>9&nbsp;&nbsp;&nbsp;&nbsp; Brush Finish \u2013 both sides as applicable. Reference data table for offset position.<\/p>\n\n\n\n<p>0&nbsp;&nbsp;&nbsp;&nbsp; Brush finish &#8211; both sides as applicable.<\/p>\n<\/div>\n<\/div>\n\n\n\n<p><strong>Final Digits \u2013 Surface Treatment<\/strong><\/p>\n\n\n\n<p>Alcoa\u00ae Wheels offers several optional surface treatments, with each one penetrating the aluminum so it won\u2019t crack, peel or corrode like coated wheels. Surface treatments are the final two or three digits in the part numbering system, after the wheel family and polish, and include:<\/p>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p>DB&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Dura-Bright\u00ae Surface Treatment<\/p>\n\n\n\n<p>DF&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Dura-Flange\u00ae Wear Protection<\/p>\n\n\n\n<p>DD&nbsp;&nbsp;&nbsp;&nbsp; Dura-Bright\u00ae + Dura-Flange\u00ae Wear Protection<\/p>\n\n\n\n<p>BLK&nbsp;&nbsp;&nbsp; Dura-Black\u2122 Wheels Surface Treatment<\/p>\n<\/div>\n\n\n\n<p><strong>Part Numbering Examples \u2013 Same Family, Different Finishes<\/strong><\/p>\n\n\n\n<p>Here\u2019s an example of a couple common 22.5&#8243; x 8.25&#8243; wheels that are in the same family, with the first five digits being 88565. That\u2019s the wheel family. Using the numbers referenced above, the first digit is an 8, which corresponds to a 22.5&#8243; diameter and the second digit is also an 8, which corresponds to an 8.25&#8243; rim width. The third number, a 5, is reserved for engineering. The fourth number, a 6, corresponds to a 10 on 285.75 hub pilot. The fifth number is reserved for engineering.<\/p>\n\n\n\n<p>Taking that wheel family a step further, we add on a sixth digit for polish and final digits for an optional surface treatment. Both the 885657 and 885651DB in the example below are the same wheel family, just different finishes applied to the wheel.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" height=\"535\" width=\"1024\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_3.jpg?w=1024\" alt=\"\" class=\"wp-image-4827\" srcset=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_3.jpg 1200w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_3.jpg?resize=300,157 300w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_3.jpg?resize=768,401 768w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_3.jpg?resize=1024,535 1024w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" height=\"535\" width=\"1024\" src=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_4.jpg?w=1024\" alt=\"\" class=\"wp-image-4828\" srcset=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_4.jpg 1200w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_4.jpg?resize=300,157 300w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_4.jpg?resize=768,401 768w, https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2024\/07\/AW_Finish_Article_4.jpg?resize=1024,535 1024w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Taking this same wheel family example even further, let\u2019s say you wanted the ultimate blend of durability and low maintenance, combining the Dura-Flange\u00ae + Dura-Bright\u00ae surface treatments. For example, if the wheel family still is 88565, the part number for a Dura-Flange\u00ae + Dura-Bright\u00ae finish would be:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>885651DD &#8211; for Dura-Flange\u00ae and Dura-Bright\u00ae with Mirror Polish on the steer\/outside only<\/li>\n\n\n\n<li>885652DD &#8211; for Dura-Flange\u00ae and&nbsp;Dura-Bright\u00ae with Mirror Polish on the inside only<\/li>\n\n\n\n<li>885653DD &#8211; for Dura-Flange\u00ae and&nbsp;Dura-Bright\u00ae with Mirror Polish on both sides<\/li>\n<\/ul>\n\n\n\n<p>The most important thing to remember from this guide is the distinction between the three components of each part number: wheel family, polish and surface treatment, and knowing that the first two digits correspond to diameter first and then rim width. With the right information, you can quickly locate the best wheel for your needs.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.alcoawheels.com\/north-america\/en\/wp-content\/uploads\/sites\/27\/2023\/07\/AW_SpecGuide2024_June_2.pdf\">Product Spec Guide (English)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding The Alcoa\u00ae Wheels Numbering System If you\u2019re trying to figure out how to read part numbers to spec the best wheels for your fleet or are just interested in knowing what all the digits and letters represent, this handy guide will help you do that. It will help you understand the structure of the [&hellip;]<\/p>\n","protected":false},"author":51,"featured_media":4782,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"protected_reviewer_email":"","editor_notices":[],"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4781","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Read Part Numbers - North America<\/title>\n<meta name=\"description\" content=\"Understanding The Alcoa\u00ae Wheels Numbering System. 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