T47a for 77mm asymmetrical shell. T47a is a threaded bottom bracket shell design, utilizing the oversized interface of BB right, but with the benefit and peace of mind of a threaded interface. Compatible frames feature an asymmetrical 77mm shell width, placing the non-drive side bearing within the frame, and the drive side bearing externally.Equipped with precision dust covers for a snug & secure fit that also fully protects the face of the bearing delivers exceptional performance without any sacrifices. CeramicSpeed hand-built bearings carry the load from crank to frame with un-paralleled durability & efficiency.In The Box:- 2 cups with CeramicSpeed bearings and dust covers- 2-part spacer tube- CeramicSpeed All Round Grease- Spacers for setup & adjustments- Sticker sheetFeatures:- Optimized Power Transfer- Longest Product Lifetime- Lowest FrictionSpecifications:- Net weight: 105.0 g- Gross Weight: 167 g- BB Type: T47a