Promax SC-1 Square Taper Chromo JIS Bottom Bracket 113mm Black keyword search-HS33 Isolate and tune bottom-out with

Isolate and tune bottom-out with minimal changes to initial and mid-stroke

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Promax SC-1 Square Taper Chromo JIS Bottom Bracket 113mm Black keyword search-HS33 Isolate and tune bottom-out withPromax SC 1 Square Taper Chromo JIS Bottom Bracket 113mm 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 TECH SPECS Bottom Bracket Shell I.