Threaded bottom brackets

T47 is a standard created by custom frame manufacturers. It has a thread, an internal diameter of 47 mm and a width of 73 mm. It has the constructional advantages of being oversized and wide, but also the practical advantages of threads. This kit pairs these BBs with 30 mm spindle cranks. The cups have CeramicSpeed bearings pressed in. There are two options for the bearings. The standard bearing has CeramicSpeed balls and hardened steel races. The coated bearing has the same balls running on a 3-micron thick coating placed on top of these hardened steel races for increased durability and even less friction. This BB is compatible with 73mm frames. Bottom bracket tool: BBT-79. In the box: 2 installed bearing cups 2 x 1mm spacers 2 x 0.5mm spacers 2 dust covers O-ring Spacer tube All Round Grease Decal