How bear lists the draw weights, bow lengths has varied a bit over time. Bear bear used to list the draw weights and resulting bow length on the base of its TD limbs for all three riser lengths. The numbers will be listed vertically and read something like this -- A - 56"-- 50#, B 60"- 48#, C - 64" -45#. Actually, the full sequence is only listed on one limb. On the other limb, only that limb's (bow's) length and weight are provided. Older red tip and white tip limbs (and maybe a few other colors) are marked like this.
Some older Green tip limbs are marked for B risers only, and I think they were only made in the shortest limb length, making a 60-inch bow on a B riser. The green stripe riser was only made in B length. On newer limbs, the length and draw weights are provided for A and B riser lengths only. These would be the red/black and white/black tip limbs.
MNbwhtr provides a good example of how much the poundage will increase when drawn an extra two inches.