PF30 Superlight Lugless Bottom Bracket- Center Relieved & Externally reinforced for 73mm
This shell has an external "hoop" reinforcement to resist ovalization from welding. The inside is also relieved for better weldability and reduced weight.
CNC Machined from 4130 Seamless Stock
Width: 73.15mm- requires little or no finishing
Outside Diameter: 49.4mm-1.950
Outside reinforcement hoop Diameter:50.6mm-1.991
Inside diameter at the PF30 interface: 45.4mm-1.787- the part is delivered underside and must be finish reamed to 46.00
Depth of inside diameter reinforcement: 10mm before relief
Inside diameter is relieved to 46.9mm leaving a 1.25mm wall in the thin section.
73.15mm WIDE WITH INTERNALLY RELIEVED CENTER
IT DOESN'T GET ANY BETTER THAN THIS!
**Under BB delrin cable guide is found here**