T47/73 Bottom Bracket for SRAM DUB MTB:T47 is a standard created by custom frame builders. It's threaded, has an inner diameter of 47mm, and is 73mm wide. It has the design benefits of being oversized and wide, but also the practical benefits of threads. The cups have CeramicSpeed bearings pressed in. The Coated Bearing has CeramicSpeed balls running on a 3-micron thick coating placed on top of hardened-steel races for greater durability and less friction.This BB is compatible with 73mm frames. In the box:- 2 cups with CeramicSpeed Bearings installed- 2 dustcovers- S pacer-tube- 4 x 1mm spacers- 2 x 3mm spacers- CeramicSpeed All Round Grease- Sticker sheet Tech Data: This BB is compatible with 73mm frames. Installation of T47/73 Bottom Bracket for SRAM DUB MTB: If you don´t have any experience installing bottom brackets and bearings, we recommend that you have your local bike shop fit your new bearings. Maintenance of CeramicSpeed Bottom Brackets: We recommend that you follow our instructions on how to maintain your CeramicSpeed Bottom Brackets to achieve the lowest friction and the best longevity.