{"product_id":"pro-bat-rear-hydraulic-brake-assembly-caliper-master-cylinder-kit","title":"PRO BAT Rear Hydraulic Brake Assembly Caliper Master Cylinder Kit","description":"\u003cp\u003eOur review of the PRO BAT Rear Hydraulic Brake Assembly finds it best suited for owners of small Chinese ATVs, go karts and 50cc-250cc quad conversions who want a complete rear brake that arrives ready to install. The kit includes a fully assembled rear caliper and master cylinder with brake fluid and a 158mm rotor, which is the single biggest convenience - it removes the need to bench-bleed or source pads separately. For anyone replacing a rear brake on Coolster, Taotao or similar 50cc to 200cc machines, this package aims to speed up repair time.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete rear assembly:\u003c\/strong\u003e The kit ships with a prefilled rear brake assy so the system is ready to mount and helps reduce installation steps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded 158mm rotor:\u003c\/strong\u003e The 158mm outer diameter rotor provides a matched braking surface for the caliper and avoids rotor sourcing delays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtra brake pads:\u003c\/strong\u003e A spare pair of pads is included so you have a replacement on hand after initial bedding or if a pad is damaged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic line length:\u003c\/strong\u003e The 1400mm hydraulic tubing gives enough reach for most small quad and kart rear layouts without rerouting hose extensions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete mounting hardware:\u003c\/strong\u003e Bolts and ties are included to simplify fitting the rotor and caliper to compatible swingarms or hubs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is aimed at DIY mechanics and small-vehicle owners who need a direct replacement rear brake for Chinese-built ATVs, go karts, drift trikes and 50cc to 250cc machines from brands like Coolster, Taotao, Kazuma and similar. It suits people who want a mostly plug-and-play solution with rotor, pads and fluid included so they can refit quickly.\u003c\/p\u003e\n\u003cp\u003eIt is not ideal for users who require exact OEM fitment for non-standard frames or for those who expect a performance, high-end race caliper; some customers reported mixed functionality and occasional pad retention issues, so riders who demand guaranteed high-performance stopping should consider higher-spec brake systems or professional installation and testing.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComes prefilled and assembled, which saves time and reduces bleed work during installation.\u003c\/li\u003e\n\u003cli\u003eIncludes rotor, extra pads and mounting hardware, offering good value for the price.\u003c\/li\u003e\n\u003cli\u003eHydraulic hose length and mounting spacings are suitable for many 50cc-200cc small ATVs and go karts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFunctionality reports are mixed; some users find braking strong while others encountered poor performance, so testing after fitment is advised.\u003c\/li\u003e\n\u003cli\u003eThere are occasional reports of brake pads not seating securely in the caliper, which may require minor adjustments or retainer checks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eChinese ATV, go kart, golf cart, drift trike 50cc-250cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotor outer diameter\u003c\/td\u003e\n\u003ctd\u003e158mm (6.22 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotor inner diameter\u003c\/td\u003e\n\u003ctd\u003e48mm (1.88 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotor thickness\u003c\/td\u003e\n\u003ctd\u003e9mm (0.35 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydraulic tubing length\u003c\/td\u003e\n\u003ctd\u003e1400mm (55.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaster cylinder mount spacing\u003c\/td\u003e\n\u003ctd\u003e45mm (1.77 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCaliper mounting hole spacing\u003c\/td\u003e\n\u003ctd\u003e63mm (2.48 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis PRO BAT rear hydraulic brake kit is a practical, value-focused replacement for owners of Coolster, Taotao and similar small ATVs who want a mostly ready-to-fit rear brake with rotor and spare pads included. It offers solid convenience and value, though buyers should verify pad fitment and perform a brake test after mounting because user feedback on stopping consistency is mixed.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this kit ready to install out of the box?\u003c\/strong\u003e\u003cbr\u003eYes, the rear brake assembly is supplied with brake fluid and brake pads installed, so it arrives ready for mounting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the rotor and caliper fit my 150cc quad?\u003c\/strong\u003e\u003cbr\u003eThe rotor is 158mm with provided mounting hardware and the caliper has 63mm mount spacing; it fits many 50cc-250cc Chinese ATVs but confirm hub and swingarm compatibility before purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre extra pads included?\u003c\/strong\u003e\u003cbr\u003eYes, the package includes one extra pair of brake pads in addition to the pads preinstalled on the caliper.\u003c\/p\u003e","brand":"PRO BAT","offers":[{"title":"Default Title","offer_id":48651026202843,"sku":"B0C4T72QYJ","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71wVNFG_W9L._AC_SL1500.jpg?v=1778551655","url":"https:\/\/gearmusthave.com\/products\/pro-bat-rear-hydraulic-brake-assembly-caliper-master-cylinder-kit","provider":"GearMustHave","version":"1.0","type":"link"}