The shimano bh90 xtr m9000m920 disc brake hose is a premium replacement resin coated hydraulic brake hose the stiff reinforced hose allows you to keep your brakes sharp even under pressure featuring a 21mm bore diameter for excellent brake performance and response it is engineered for use with shimano xtr m9000 and m9020 disc brake systems available in 2 lengths front 1000mm or rear 1700mm which are easily cuttable