The BB T47/86 Inboard Bottom Bracket features an oversized interface of PF30 and EVO386, providing the advantages of a threaded interface while offering peace of mind. Compatible with 85,5mm wide Trek frames and standard 86mm wide T47 Inboard frame designs, this BB places the bearings within the frame's width. It is a threaded standard with a 47mm inner diameter and a width of 86mm, designed by custom frame builders. Additionally, this kit includes 30mm spindle cranks and CeramicSpeed bearings pressed into the cups. Two bearing options are available - the Standard Bearing with CeramicSpeed Balls and hardened-steel races, or the Coated Bearing with a 3-micron thick coating over the races for increased durability and decreased friction. This BB is also compatible with 86mm frames and TREK T47 85.5mm wide frames. The installation requires a BBT-47 Bottom Bracket tool, and the package includes 2 cups