Crafted for precision and durability, the SRAM PressFit 30 bottom bracket shell from Paragon Machine Works is an essential component for high-quality bike builds. Made from robust 4130 steel tubing, this shell boasts a 2" outer diameter and a 45.5 mm inner diameter, ensuring strength and reliability. Measuring 69 mm in width, it is slightly oversized to allow for welding cleanup, while the inside diameter features a relief to 46.66 mm for an optimal fit.