{"product_id":"fvrito-hydraulic-rear-disc-brake-master-cylinder-caliper-kit-12mm-axle-for-ssr-125-110cc-includes-spare-pads","title":"FVRITO Hydraulic Rear Disc Brake Master Cylinder \u0026 Caliper Kit — 12mm Axle for SSR 125\/110cc, Includes Spare Pads","description":"\u003cp\u003e\u003cstrong\u003eFVRITO's hydraulic rear disc brake master cylinder and caliper assembly is a complete 12mm rear brake kit designed to replace or upgrade the rear braking system on many 50–150cc pit and dirt bikes, including SSR 125 and 110 models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact hydraulic brake assembly combines a master cylinder and caliper into a ready-to-install unit aimed at small-displacement off-road motorcycles and Chinese-made pit bikes. It arrives with spare pads, ties, and a fuel filter, and is intended for frames and wheel shafts that accept a 12mm axle. Read on for fitment details, measurements, installation considerations, and who benefits most from this kit.\u003c\/p\u003e\n\n\u003ch3\u003eWill this rear brake fit my SSR 125 or 110cc pit bike?\u003c\/h3\u003e\n\n\u003cp\u003eCompatibility depends primarily on axle diameter and mounting spacing. The FVRITO assembly is made for a 12mm rear wheel shaft and suits many 50–150cc models from common Chinese and off-road brands, but it will not fit bikes with a 15mm axle without modification.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDesigned for 12mm rear wheel shafts only—confirm your axle size before buying.\u003c\/li\u003e\n  \u003cli\u003eWorks with a long list of brands and models commonly used in pit bikes and small dirt bikes.\u003c\/li\u003e\n  \u003cli\u003eCheck mounting hole distance and banjo bolt thread size against your bike.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the exact dimensions and connection specs I need to check?\u003c\/h3\u003e\n\n\u003cp\u003eThe listing includes several key measurements you should compare with your bike before ordering. Match the brake cylinder mounting range, hose length, and banjo bolt thread to avoid fitment issues during installation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMounting hole distance: adjustable in the 42–50mm (1.65–1.97\") range.\u003c\/li\u003e\n  \u003cli\u003eBrake oil hose length: approximately 550mm (21.65\").\u003c\/li\u003e\n  \u003cli\u003eHole diameter (for rotor clearance): about 79mm (3.11\").\u003c\/li\u003e\n  \u003cli\u003eMount axle hole: 12mm (0.47\"); banjo bolt: M10 x 1.25.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the package and what tools or parts might I still need?\u003c\/h3\u003e\n\n\u0026gt;The kit ships as a mostly complete assembly with small extras to help with fitment and first installation. You may still need basic tools and possibly brake fluid or adaptors, depending on how your bike's brake line routes and fittings compare.\n\n\u003cul\u003e\n  \u003cli\u003eIncluded: 1 brake assembly, 3 cable\/tie straps, 1 extra pair of brake pads, 1 fuel filter.\u003c\/li\u003e\n  \u003cli\u003eCommonly required but not included: DOT brake fluid, basic hand tools, thread sealant or copper crush washer if your banjo fitting differs.\u003c\/li\u003e\n  \u003cli\u003eMay require minor bracket or routing adjustments to align with your existing rotor and axle spacing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I confirm fitment and avoid common mistakes?\u003c\/h3\u003e\n\n\u003cp\u003eCarefully compare the product measurements and the images to your bike's existing hardware before ordering. Confirm the axle diameter, mounting distance, and bolt thread size, and consider consulting the seller if any dimension is unclear.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMeasure your rear axle diameter—this product fits 12mm shafts only.\u003c\/li\u003e\n  \u003cli\u003eCompare the listed mounting hole distance (42–50mm) to your caliper bracket points.\u003c\/li\u003e\n  \u003cli\u003eVerify banjo bolt thread (M10x1.25) and hose routing for clearance and length.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This FVRITO rear hydraulic disc brake assembly suits riders, mechanics, and DIYers upgrading or replacing the rear brake system on small off-road bikes and pit motorcycles from 50cc to about 150cc—especially SSR 125\/110 owners and riders of similar Chinese-brand models. It's a practical option for those who need a ready-to-install, 12mm-axle-compatible hydraulic brake unit and who can confirm the measurements match their bike. If you are unsure about fitment, measure your axle and mounting points or contact the seller with your bike model and dimensions before purchasing.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this fit a 15mm rear axle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This assembly is built for 12mm rear wheel shafts only; 15mm axles are not compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are brake pads included and are spares supplied?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes one extra set of brake pads along with the installed pads.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FVRITO","offers":[{"title":"Default Title","offer_id":48085685665950,"sku":"B097R437MX","price":49.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/fvrito-rear-brake-assembly-front-view.jpg?v=1785876772","url":"https:\/\/northtrailauto.ca\/products\/fvrito-hydraulic-rear-disc-brake-master-cylinder-caliper-kit-12mm-axle-for-ssr-125-110cc-includes-spare-pads","provider":"North Trail Auto","version":"1.0","type":"link"}