ATTN: incompatible with normal 1.37"X24T BB tubes.
Also available in titanium model, TI axle 90g, full set 180g (including bearings, bolts & spacers)
The lower one is the sealed bearings style ISIS BB Set. The axle is strong, but the bearings are very weak, the balls are so small. We don't suggest trials riders use these BB for trials riding.
The middle one is the ECHO TR ISIS BB. It has larger balls in the bearings, but the bearings use much of the axle space. So the axle is not very strong. The bearings are also too close to the center. This increases the risk of broken axles.
The top one is our new ECHO integrated BB, the bearing is much closer to the cranks. This means the design is stronger. We also make the walls of the axle thicker. In the end, It's lighter than the middle one.
