Promax SC-1 Bottom Bracket BSA Square Taper 68 mm 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
• Chainline with a 113 BB spindle: 42.3
• Q-Factor with a 113 BB spindle: 151.1

• Bottom Bracket Shell I.D.: 1.37
• BB/Frame Interface: English
• BB Shell Width (mm): 68
• Weight: 253
• Spindle Interface Type: Square Taper JIS
• Spindle Length: 113
• Defined Color: Black