{"id":90151,"date":"2025-03-17T18:23:54","date_gmt":"2025-03-17T23:23:54","guid":{"rendered":"https:\/\/discountrcparts.com\/index.php\/product\/30-12t-steel-helical-diff-ring-pinion-rear-gear-set-grom\/"},"modified":"2026-04-02T17:12:48","modified_gmt":"2026-04-02T22:12:48","slug":"hot-racing-arrma-grom-steel-helical-rear-differential-ring-gear-pinion-gear-30t-12t-grm9302r","status":"publish","type":"product","link":"https:\/\/discountrcparts.com\/index.php\/product\/hot-racing-arrma-grom-steel-helical-rear-differential-ring-gear-pinion-gear-30t-12t-grm9302r\/","title":{"rendered":"Hot Racing Arrma Grom Steel Helical Rear Differential Ring Gear\/Pinion Gear (30T\/12T)"},"content":{"rendered":"<p data-start=\"93\" data-end=\"550\">Upgrade your Arrma Grom 1\/18 4WD with Hot Racing&#8217;s high-torque steel helical rear differential gear set. This precision CNC-machined gear set features spiral-cut helical teeth, which provide smoother power transfer, greater durability, and increased strength over stock bevel gears. Designed for demanding off-road conditions, this high-carbon steel gear set delivers improved efficiency and longer-lasting performance.<\/p>\n<h3 data-start=\"552\" data-end=\"571\"><strong data-start=\"556\" data-end=\"569\">Includes:<\/strong><\/h3>\n<ul data-start=\"572\" data-end=\"691\">\n<li data-start=\"572\" data-end=\"634\">(1) 30-tooth helical spiral cut differential ring gear<\/li>\n<li data-start=\"635\" data-end=\"691\">(1) 12-tooth helical spiral cut rear pinion gear<\/li>\n<\/ul>\n<h3 data-start=\"978\" data-end=\"997\"><strong data-start=\"982\" data-end=\"995\">Features:<\/strong><\/h3>\n<ul data-start=\"998\" data-end=\"1363\">\n<li data-start=\"998\" data-end=\"1081\">Precision CNC-machined helical spiral gears for smoother, quieter operation<\/li>\n<li data-start=\"1082\" data-end=\"1157\">High-carbon steel construction for superior strength and durability<\/li>\n<li data-start=\"1158\" data-end=\"1220\">Enhanced torque handling compared to stock bevel gears<\/li>\n<li data-start=\"1221\" data-end=\"1302\">Improves drivetrain efficiency and longevity under high-stress conditions<\/li>\n<li data-start=\"1303\" data-end=\"1363\">Direct replacement for stock rear differential gears<\/li>\n<\/ul>\n<h3 data-start=\"1365\" data-end=\"1390\"><strong data-start=\"1369\" data-end=\"1388\">Specifications:<\/strong><\/h3>\n<ul data-start=\"1391\" data-end=\"1498\">\n<li data-start=\"1391\" data-end=\"1425\"><strong data-start=\"1393\" data-end=\"1419\">Ring Gear Tooth Count:<\/strong> 30T<\/li>\n<li data-start=\"1426\" data-end=\"1462\"><strong data-start=\"1428\" data-end=\"1456\">Pinion Gear Tooth Count:<\/strong> 12T<\/li>\n<li data-start=\"1463\" data-end=\"1498\"><strong data-start=\"1465\" data-end=\"1478\">Material:<\/strong> High-carbon steel<\/li>\n<\/ul>\n<h3 data-start=\"1500\" data-end=\"1519\"><strong data-start=\"1504\" data-end=\"1517\">Comments:<\/strong><\/h3>\n<ul data-start=\"1520\" data-end=\"1671\">\n<li data-start=\"1520\" data-end=\"1599\">Replaces stock Arrma rear diff ring\/pinion gears (ARA311177 &amp; ARA311182)<\/li>\n<li data-start=\"1600\" data-end=\"1671\">Must be installed as a set for proper gear mesh and performance<\/li>\n<li>High-temp grease (Hot Racing SPL10G05 recommended) for differential lubrication<\/li>\n<\/ul>\n<p data-start=\"1673\" data-end=\"1901\" data-is-last-node=\"\" data-is-only-node=\"\">Enhance the durability and performance of your Arrma Grom 1\/18 4WD with Hot Racing&#8217;s steel helical differential gear set, providing greater torque capacity and smooth drivetrain operation for off-road adventures.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Upgrade your Arrma Grom 1\/18 4WD with Hot Racing&#8217;s high-torque steel helical rear differential gear set. This precision CNC-machined gear set features spiral-cut helical teeth, which provide smoother power transfer, greater durability, and increased strength over stock bevel gears. Designed for demanding off-road conditions, this high-carbon steel gear set delivers improved efficiency and longer-lasting performance. [&hellip;]<\/p>\n","protected":false},"featured_media":90175,"template":"","meta":[],"product_brand":[],"product_cat":[585,479,634,599],"product_tag":[],"class_list":{"0":"post-90151","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-granite-grom","7":"product_cat-hot-racing","8":"product_cat-mojave-grom","9":"product_cat-typhon-grom","11":"first","12":"instock","13":"taxable","14":"shipping-taxable","15":"purchasable","16":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hot Racing Arrma Grom Steel Helical Rear Differential Ring Gear\/Pinion Gear (30T\/12T) - Discount RC Parts<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/discountrcparts.com\/index.php\/product\/hot-racing-arrma-grom-steel-helical-rear-differential-ring-gear-pinion-gear-30t-12t-grm9302r\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hot Racing Arrma Grom Steel Helical Rear Differential Ring Gear\/Pinion Gear (30T\/12T) - Discount RC Parts\" \/>\n<meta property=\"og:description\" content=\"Upgrade your Arrma Grom 1\/18 4WD with Hot Racing&#8217;s high-torque steel helical rear differential gear set. This precision CNC-machined gear set features spiral-cut helical teeth, which provide smoother power transfer, greater durability, and increased strength over stock bevel gears. Designed for demanding off-road conditions, this high-carbon steel gear set delivers improved efficiency and longer-lasting performance. 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