ZTTO Bicycle BSA Bottom Bracket Quare Hole Crank Axis bicycle parts BB for Square Tapered Spindle Crankset

ZTTO BSA Bottom Bracket 

For 68mm Frame Shell 

Weight: about 316g
Size: 68 X103/107/110.5/113/116mm
Cups thread size and pitch: 34.798mm 1.37*24TPI
Structure: 2 Bearings 

[Long service time]
The bottom bracket is solid and durable with a long service time. 

[Steel Material]
The steel shell can absorb roundness tolerance for installing ports of Bracket Bottom. 

[Perfect Integrated System]
Integrated System can protect the frame, more power output, it's better than ordinary structure bottom bracket.