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2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine
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Shimano XT M8100 four-piston brakes on test – Where there is lots of light, there are also shadows | ENDURO Mountainbike Magazine
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2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine
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First ride review: Shimano XTR M9100 12-speed drivetrain and 4-piston brakes | ENDURO Mountainbike Magazine
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