{"product_id":"77-121rw-02-12k-electric-brake-12-1-4-x-5-right-side-5-bolt-rw-compatible-mt","title":"77-121RW-02 - 12K Electric Brake – 12-1\/4\" x 5\" – Right Side – 5-Bolt – RW Compatible | MT","description":"\u003cp\u003eThis MAT electric brake assembly is designed for 12,000-lb trailer axles and features a 12-1\/4\" x 5\" brake size with a 5-bolt mounting flange. Built as a complete right-hand brake assembly, it is compatible with RW-style axles and features a self-adjusting design that maintains proper shoe alignment for consistent braking performance and reduced maintenance.\u003c\/p\u003e\n\u003ch5\u003eDetailed Information:\u003c\/h5\u003e\n\u003ctable style=\"width: 100%; border: 1px solid #ddd; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eBrake Type\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eElectric drum brake\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eBrake Size\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e12-1\/4\" x 5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eAxle Capacity\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e12,000 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eMounting Flange\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e5-bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eSide\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eRight hand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eCompatibility\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eRW axle version\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eBrand\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eMAT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003ePart Number\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e77-121RW-02\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch5\u003eFitting:\u003c\/h5\u003e\n\u003cp\u003eDesigned for 12K trailer axles with a 5-bolt brake flange. This is a right-hand brake assembly and must be paired with a corresponding left-hand brake on the opposite side.\u003c\/p\u003e\n\u003ch5\u003eFeatures:\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-Adjusting Design:\u003c\/strong\u003e Automatically maintains proper shoe-to-drum clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Assembly:\u003c\/strong\u003e Includes shoes, magnet, springs, and backing plate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Performance:\u003c\/strong\u003e Built for demanding 12,000-lb axle applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRW Compatibility:\u003c\/strong\u003e Designed to work with RW-style axle configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Maintenance:\u003c\/strong\u003e Self-adjusting system minimizes manual brake adjustments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eProduct Overview:\u003c\/h5\u003e\n\u003cp\u003eThe MAT electric brake assembly provides dependable stopping power for 12K trailer axles. With its self-adjusting design and complete right-hand configuration, it delivers consistent braking performance, longer service life, and reduced maintenance for heavy-duty trailer use.\u003c\/p\u003e","brand":"MAT","offers":[{"title":"Default Title","offer_id":44894113595600,"sku":"12ERSA-RKWL-MT","price":120.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/0353\/6080\/files\/99-86510-399-ls-drum-hub-short-10k-axle-8-on-65-58-studs-mt-2006569.png?v=1787605342","url":"https:\/\/haulktrailerparts.com\/products\/77-121rw-02-12k-electric-brake-12-1-4-x-5-right-side-5-bolt-rw-compatible-mt","provider":"HAULK DEPOT®","version":"1.0","type":"link"}