{"id":612,"date":"2026-10-20T12:17:26","date_gmt":"2026-10-20T12:17:26","guid":{"rendered":"https:\/\/ndovu.org.uk\/cs\/?p=612"},"modified":"2026-10-20T12:24:34","modified_gmt":"2026-10-20T12:24:34","slug":"stem-racing-1-3-technical-data","status":"publish","type":"post","link":"https:\/\/ndovu.org.uk\/cs\/stem-racing-1-3-technical-data\/","title":{"rendered":"STEM Racing 1.3 &#8211; Technical data"},"content":{"rendered":"\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>STEM Racing Car Specs!<\/title>\n    <style>\n        body { font-family: 'Comic Sans MS', 'Chalkboard SE', sans-serif; background-color: #f0f8ff; color: #333; margin: 0; padding: 20px; }\n        h1 { text-align: center; color: #ff4500; font-size: 2.5em; text-shadow: 1px 1px 2px #ccc; }\n        .tier { background-color: #ffffff; border: 4px solid #ccc; border-radius: 15px; padding: 20px; margin-bottom: 25px; box-shadow: 0 6px 12px rgba(0,0,0,0.1); }\n        .tier-1 { border-color: #ff1493; }\n        .tier-2 { border-color: #1e90ff; }\n        .tier-3 { border-color: #32cd32; }\n        h2 { margin-top: 0; font-size: 2em; }\n        .tier-1 h2 { color: #ff1493; }\n        .tier-2 h2 { color: #1e90ff; }\n        .tier-3 h2 { color: #32cd32; }\n        details { background-color: #f9f9f9; border: 2px dashed #bbb; border-radius: 10px; padding: 15px; margin-bottom: 12px; cursor: pointer; transition: background-color 0.2s; }\n        details:hover { background-color: #fffacd; border-color: #ffa500; }\n        summary { font-size: 1.3em; font-weight: bold; color: #444; outline: none; list-style: none; }\n        summary::-webkit-details-marker { display: none; }\n        ul { line-height: 1.8; font-size: 1.15em; margin-top: 15px; }\n        li { margin-bottom: 10px; }\n        p.intro { text-align: center; font-size: 1.3em; max-width: 800px; margin: 0 auto 30px auto; color: #555; }\n        .highlight { background-color: #ffff00; padding: 2px 5px; border-radius: 5px; }\n        .handbook-link { display: inline-block; margin-top: 15px; padding: 12px 18px; background-color: #333; color: #fff; text-decoration: none; border-radius: 8px; font-weight: bold; font-size: 1.1em; transition: background-color 0.3s; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }\n        .handbook-link:hover { background-color: #555; }\n        .tier-1 .handbook-link { background-color: #ff1493; }\n        .tier-1 .handbook-link:hover { background-color: #d10074; }\n        .tier-2 .handbook-link { background-color: #1e90ff; }\n        .tier-2 .handbook-link:hover { background-color: #006bcf; }\n        .tier-3 .handbook-link { background-color: #32cd32; }\n        .tier-3 .handbook-link:hover { background-color: #229922; }\n    <\/style>\n<\/head>\n<body>\n    <h1>\ud83c\udfce\ufe0f STEM Racing Car Checklist \ud83c\udfce\ufe0f<\/h1>\n    <p class=\"intro\">Click on the sections below to reveal the secret specs, dimensions, and rules you need to build your ultimate racing machine!<\/p>\n\n    <!-- Tier 3 -->\n    <div class=\"tier tier-3\">\n        <h2>\ud83d\udfe2 Tier 3: Beginners (The &#8220;Car Only&#8221; Class)<\/h2>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udccf Dimensions &#038; Weight<\/summary>\n            <ul>\n                <li><strong>Weight:<\/strong> Minimum <span class=\"highlight\">55g<\/span> (without the CO2 cartridge).<\/li>\n                <li><strong>Length:<\/strong> Between 170mm and 210mm.<\/li>\n                <li><strong>Width:<\/strong> Maximum 90mm.<\/li>\n            <\/ul>\n        <\/details>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udee0\ufe0f Body &#038; Parts<\/summary>\n            <ul>\n                <li><strong>Body:<\/strong> 3D printed or made by hand from an official STEM Racing block.<\/li>\n                <li><strong>Wheels:<\/strong> 4 standard wheels (must all touch the track).<\/li>\n                <li><strong>Axles:<\/strong> 2 steel axles (Max length 66mm, 3mm diameter) and 4 standard bushes.<\/li>\n            <\/ul>\n        <\/details>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udee1\ufe0f Safety Checks<\/summary>\n            <ul>\n                <li><strong>No-Go-Zone:<\/strong> Must fit safely inside the car body.<\/li>\n                <li><strong>CO2 Chamber:<\/strong> Must hold the 8g CO2 cartridge. The safety wall around it must be at least <strong>3mm thick<\/strong>.<\/li>\n                <li><strong>Tethers:<\/strong> You need an uninterrupted slot underneath and 2 standard screw eyes to guide the car on the track.<\/li>\n            <\/ul>\n        <\/details>\n        <a href=\"https:\/\/www.stemracing.lu\/resources\/stem-racing-luxembourg-rules\" target=\"_blank\" class=\"handbook-link\">\ud83d\udcd6 Read the Full Tier 3 Handbook<\/a>\n    <\/div>\n\n    <!-- Tier 2 -->\n    <div class=\"tier tier-2\">\n        <h2>\ud83d\udd35 Tier 2: Intermediate (Stepping Up)<\/h2>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udccf Dimensions &#038; Weight<\/summary>\n            <ul>\n                <li><strong>Weight:<\/strong> Minimum <span class=\"highlight\">50g<\/span> (without the CO2 cartridge).<\/li>\n                <li><strong>Length:<\/strong> Between 170mm and 210mm.<\/li>\n                <li><strong>Width:<\/strong> Maximum 90mm.<\/li>\n            <\/ul>\n        <\/details>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udee0\ufe0f Body &#038; Parts<\/summary>\n            <ul>\n                <li><strong>Body:<\/strong> Must be 3D printed.<\/li>\n                <li><strong>Wings:<\/strong> Front wing and Rear wing must have a thickness between 2mm and 15mm, and a clear span of at least 50mm.<\/li>\n                <li><strong>Wheels:<\/strong> 4 standard wheels and 2 standard axles.<\/li>\n            <\/ul>\n        <\/details>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udee1\ufe0f Safety Checks<\/summary>\n            <ul>\n                <li><strong>No-Go-Zone:<\/strong> Must fit safely inside the car body.<\/li>\n                <li><strong>Tethers:<\/strong> 2 standard screw eyes attached to the bottom.<\/li>\n            <\/ul>\n        <\/details>\n        <a href=\"https:\/\/www.stemracing.lu\/resources\/stem-racing-luxembourg-rules\" target=\"_blank\" class=\"handbook-link\">\ud83d\udcd6 Read the Full Tier 2 Handbook<\/a>\n    <\/div>\n\n    <!-- Tier 1 -->\n    <div class=\"tier tier-1\">\n        <h2>\ud83d\udfe3 Tier 1: Advanced (World Finals Contenders)<\/h2>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udccf Dimensions &#038; Weight<\/summary>\n            <ul>\n                <li><strong>Weight:<\/strong> Minimum <span class=\"highlight\">48g<\/span> (without the CO2 cartridge).<\/li>\n                <li><strong>Width:<\/strong> Between 65mm and 90mm.<\/li>\n                <li><strong>Wheelbase:<\/strong> Between 120mm and 140mm.<\/li>\n            <\/ul>\n        <\/details>\n        <details>\n            <summary>\ud83d\udc49 \ud83d\udee0\ufe0f Body &#038; Parts<\/summary>\n            <ul>\n                <li><strong>Body:<\/strong> MUST be <strong>CNC milled<\/strong> from an official STEM Racing Model Block (no 3D printing for the main body).<\/li>\n                <li><strong>Special Parts:<\/strong> Must include a securely attached Halo (v2026) and a driver&#8217;s Helmet (v2026).<\/li>\n                <li><strong>Wheels:<\/strong> Front wheels must be at least 13mm wide, rear wheels at least 16mm wide. All must be 28-32mm in diameter.<\/li>\n                <li><strong>Wings:<\/strong> Front and rear wings must have a chord of 15-25mm, thickness of 2-6mm, and a minimum span of 50mm.<\/li>\n            <\/ul>\n        <\/details>\n        <a href=\"https:\/\/www.stemracing.lu\/resources\/stem-racing-luxembourg-rules\" target=\"_blank\" class=\"handbook-link\">\ud83d\udcd6 Read the Full Tier 1 Handbook<\/a>\n    <\/div>\n\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"<p>STEM Racing Car Specs! \ud83c\udfce\ufe0f STEM Racing Car Checklist \ud83c\udfce\ufe0f Click on the sections below to reveal the secret specs, dimensions, and rules you need&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/ndovu.org.uk\/cs\/stem-racing-1-3-technical-data\/\">Continue Reading<span class=\"screen-reader-text\">STEM Racing 1.3 &#8211; Technical data<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-612","post","type-post","status-publish","format-standard","hentry","category-stem","entry"],"_links":{"self":[{"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/posts\/612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/comments?post=612"}],"version-history":[{"count":4,"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/posts\/612\/revisions"}],"predecessor-version":[{"id":618,"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/posts\/612\/revisions\/618"}],"wp:attachment":[{"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/media?parent=612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/categories?post=612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ndovu.org.uk\/cs\/wp-json\/wp\/v2\/tags?post=612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}