Fiction’s American Bottom Bracket cups allow you to use any sealed MID BB (19, 22 or 24mm) in any American bottom bracket frame. If you have a frame with an American BB shell, buy a MID BB, press the bearings into the cups and the cups into your frame. If you are upgrading from a loose ball system you will also need an 8-Spline spindle.
• 6061 T-6 Aluminum Alloy
• Bearing Size: MID (bearings not included)
• Bottom Bracket Shell Size: American
• Color: Anodized Black
• Weight: 2.0 oz (56.7g)
Brand: Fiction