Promax SC-1 Square Taper Chromoly JIS Bottom Bracket 108mm Black

Promax SC-1 Square Taper Chromoly JIS Bottom Bracket 108mm Black. SC-1 bottom brackets are the perfect choice for those who still prefer the low weight and simplicity of square taper cranks. Each bottom bracket is hand assembled using a hollow chromoly spindle precision sealed bearings forged and CNC-machined alloy cups and a composite center spacer/seal.

Hollow chromoly spindle

CNC-machined alloy cups

JIS square taper