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Review: Shimano MT520 Brakes are an Affordable 4-Piston Option for Enduro - Singletracks Mountain Bike News
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First test: Shimano XT M8100 and SLX M7100 disc brakes – lots of power at a fair price | ENDURO Mountainbike Magazine
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Shimano SLX 4-Piston Brakes Offer a Familiar Feel and Similar Power at a Better Price [Review] - Singletracks Mountain Bike News
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4 Piston Hydraulic Disc Brake Set for Mountain Bike, Disc Brake Front And Rear Levers , green, 800mm 1450mm - Walmart.com
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