{"product_id":"ruikarhop-rear-brake-master-cylinder-caliper-for-50-125cc-atvs-500-mm-line-includes-spare-pads","title":"Ruikarhop Rear Brake Master Cylinder Caliper for 50–125cc ATVs — 500 mm Line, Includes Spare Pads","description":"\u003cb\u003eHigh-strength rear brake master cylinder caliper by Ruikarhop for 50–125cc Chinese ATVs provides a direct-fit replacement to restore hydraulic braking performance.\u003c\/b\u003e\n\nIf your ATV's rear brake feels soft, leaks, or shows excessive wear, this Ruikarhop rear master cylinder caliper assembly is a drop-in replacement designed for many popular Chinese 50cc–125cc quads and youth ATVs. Built from iron and durable plastics, the unit includes a preinstalled rear disc brake pad and a pair of spare replacement pads in the package so you can reinstall and ride with minimal downtime.\n\n\u003ch3\u003eWhich ATVs is this caliper compatible with?\u003c\/h3\u003e\n\u003cp\u003eThe Ruikarhop rear brake caliper fits a wide range of Chinese-brand quads and youth ATVs from 50cc up to 125cc. It’s listed as compatible with many common models from TaoTao, Coolster, Kazuma, Apollo, KAYO and others, including specific model lines like Taotao Boulder, Coolster 3050\/3125 series and Vitacci Rider series.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 50cc, 70cc, 90cc, 110cc and 125cc Chinese ATVs and youth quads.\u003c\/li\u003e\n  \u003cli\u003eNamed compatible brands include TaoTao, Coolster, Roketa, Kazuma, KAYO, Apollo, Vitacci, ICEbear, MotoTec and many more.\u003c\/li\u003e\n  \u003cli\u003eRecognized models: Taotao Boulder B1\/110B\/125D, Coolster 3050C\/3125R\/3050D\/3125X, Vitacci Rider\/Hawk, Nitro Grizzly\/Torino, and similar units.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key specifications I should check before buying?\u003c\/h3\u003e\n\u003cp\u003eVerify mounting dimensions and hose length to ensure the caliper aligns with your bike’s brackets and hydraulic line. The Ruikarhop unit specifies a 500 mm (19.7\") brake line length and a bottom pump installation pitch of 63 mm (2.5\").\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBrake line length: 500 mm (19.7 inches).\u003c\/li\u003e\n  \u003cli\u003eBottom pump installation pitch: 63 mm (2.5 inches).\u003c\/li\u003e\n  \u003cli\u003ePackage includes: 1 rear disc brake pad installed + 1 pair replacement pads.\u003c\/li\u003e\n  \u003cli\u003eMaterial: iron caliper body with reinforced plastic components for corrosion resistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and serviceable is this replacement caliper?\u003c\/h3\u003e\n\u003cp\u003eThe assembly uses high-quality iron for strength plus engineered plastics to resist corrosion and wear. That combination improves braking feedback and prolongs service life versus thin, low-grade castings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIron construction for stronger clamping force and heat resistance.\u003c\/li\u003e\n  \u003cli\u003ePlastic processing on non-structural parts to reduce corrosion risk.\u003c\/li\u003e\n  \u003cli\u003eIncludes extra pads to simplify immediate maintenance after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what comes in the box?\u003c\/h3\u003e\n\u003cp\u003eThis caliper is intended as a direct-fit replacement for many Chinese ATV models, so installation is straightforward for anyone with basic mechanical tools and experience bleeding brakes. The kit ships with a preinstalled rear pad and a spare pair, so you can complete the swap and bed the pads before riding.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePackage contents: 1 rear disc brake pad (installed) and 1 pair replacement pads.\u003c\/li\u003e\n  \u003cli\u003eDesigned to bolt into existing rear mount points on compatible ATVs.\u003c\/li\u003e\n  \u003cli\u003eRecommended tools: basic hand tools and brake-bleeding kit for final setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\nWho is this for\n\nThis Ruikarhop rear brake master cylinder caliper is aimed at owners of Chinese-made 50–125cc ATVs and youth quads who need a reliable replacement for a worn or leaking rear brake assembly. It’s a good choice for hobby riders, repair shops, and fleet operators who want a robust, corrosion-resistant caliper that matches common mounting dimensions and includes replacement pads for quick servicing.\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this fit my 110cc Vitacci ATV?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it’s listed compatible with Vitacci 110cc models like Rider and Hawk, but confirm your brake line length and mounting pitch match the listed specs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include brake pads?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — one rear pad comes preinstalled and the package includes an additional pair of replacement disc brake pads.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Ruikarhop","offers":[{"title":"Default Title","offer_id":67588931846329,"sku":"B0B63JG5BH","price":83.81,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/ruikarhop-rear-caliper-front-view.jpg?v=1790528127","url":"https:\/\/redleafauto.ca\/products\/ruikarhop-rear-brake-master-cylinder-caliper-for-50-125cc-atvs-500-mm-line-includes-spare-pads","provider":"Redleaf Auto","version":"1.0","type":"link"}