FE-C01 - Material: steel bearing: 20319 model with hand crank connection. - Length 8T on wielowpust axis: 150mm - Diameter of the model: 23.7mm - Thread bowls: 1.37'' x 24T (BSA) - Screw thread: M8 x 1.0 - Weight: 481g cartridge bottom bracket to the FE-C01 BMX bike, combined with the crank wielowpustem 8T. - Bowls are screwed to the frame thread 1.37''x 24T (BSA). - Locking the screw M8x1.0. - Cassette is designed for the model with 23.7 mm bore.