The letter “B” on a motorcycle tyre can have two different meanings, depending on the context:
1. Bias-ply construction:
In the traditional tyre construction code, “B” stands for “bias-ply.” This refers to the tyre’s internal structure, where fabric cords are laid diagonally across the carcass (like a belt), offering a strong and stable construction.
2. Bias-belted construction:
Sometimes, “B” can also stand for “bias-belted” construction. This is a hybrid design that combines bias-ply and radial features.