Birzman Shimano BB Socket 20 notch ModelNumber=K4972 Double or Triple Double Front

Double or Triple Double Front Der/Shifter Compatibility SRAM Mountain Rear Der/Shifter Compatibility SRAM Exact Actuation Shifter Style Trigger Drivetrain Speeds 10 Weight 260

Cable routing is integrated internally into the wedge clamp to reduce drag

0mm 235mm J-bend Black Box of 100

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Birzman Shimano BB Socket 20 notch ModelNumber=K4972 Double or Triple Double FrontCompatible with Shimano cartridge or other similar 20 notch 31. 6mm bottom brackets 1 2 inch drive compatible TECH SPECS description Shimano BB socket, 20 notch compatibility Shimano and other similar 20 notch