Shimano is a Japanese manufacturer founded in 1921, headquartered in Sakai, Osaka, Japan, and a global leader in cycling components including drivetrains, brakes, wheels, and accessories. The company supplies OEM and aftermarket parts to major bicycle manufacturers and is known for engineering precision and consistent quality across its product range.
The SM-RT56 is a 180 mm brake disc for mechanical and hydraulic rim and disc brake systems, designed to provide reliable stopping power when paired with resin brake pads.
The 6-hole mount pattern is standard across most Shimano brake calipers. However, always verify compatibility with your specific caliper model before purchasing, as some older or specialty calipers may use a different mounting standard.
180 mm diameter, 6-bolt mounting pattern, designed for resin (Kunstharz) brake pads only, weight approximately 257 g. The disc is made of stainless steel with a coated surface for corrosion resistance.
One Shimano SM-RT56 brake disc, 180 mm, 6-hole mount. Installation hardware is not included — use the bolts and washers from your existing brake caliper or a Shimano-compatible set.
Yes, Shimano provides a 24-month manufacturer warranty covering defects in materials and workmanship. The warranty does not cover wear items such as brake pad surfaces or disc thickness loss from normal use.
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