Bi-laminate bottom bracket shell
The bottom bracket is the most highly-loaded part of the cycle frame and plays a major role in ensuring that the rider's power is transferred effectively from the crankset to the rear wheel. By placing the lug points at the area of maximum
bending stress under pedalling load, at the sides of the down and seat tubes - unlike the conventional arrangement where they are aligned in the fore-and-aft plane - this design greatly increases the bracket's lateral
stiffness without impairing ride quality. The bi-laminate bottom bracket is available as an option on all Hallett frames.