I've probably posted this before, maybe even earlier in this thread, but don't want to look through 45 pages to find it.
Anyway, there's been quite a bit of talk over the past few years about the newer red/black tip limbs being quite fast, with the implication or outright assertion that they're faster than the older Bear TD limbs.
Sure, the new limbs when shot with a low stretch string are faster than the older limbs when shot with B-50, but put that same low stretch string on the older limbs, and they shoot as fast as the newer limbs. At least that's been my experience.
I compared three sets of #1 limbs, marked 50#@28 inches on a B riser. Two sets were older, '80s era red tips, the third was the more recent red/black tips, made the past few years. I shot all sets on the same Green stripe riser at the same brace height with the same 12 strand D-97 string padded to 16 in the loops and the same three Easton Axis arrows.
The two older sets of red tips were 1 fps and 2 fps faster than the newer red/black tips. That's only one test. I'd like to see others replicate it.
The newer limbs are thinner, side to side, but their curvature is identical to the older limbs, so there really hasn't been a design change. Regardless, when fitted with the same string, I'm convinced the older and newer limbs shoot about the same, and both shoot plenty fast for me. I realize that not everyone wants to put a low-stretch string on older limbs, but I've been doing it for about 8 years now with no problems. On top of that, the Bear TD just seems to be a very stable, forgiving bow.