agosto 6, 2026
Promax SC-1 Bottom Bracket SC-1 bottom brackets are the perfect choice for those who still prefer the low weight and simplicity of square taper cranks. Chainline with a 113 BB spindle: 42.3Q-Factor with a 113 BB spindle: 151.1 108mm-PX-BB13CM108: 246 grams/8.67 ounces113mm-PX-BB13CM113: 253 grams/8.92 ounces.