Well it isn't cold weather. Just bad rubber. I had a new one split now as well.
I have several sets of the Rapid pivots and I have seen 2 types of rubber on them. In the beginning when the poles were black and had the gold tag sticker, the rubber was much better.
Now since Bushnell took it over, they must have changed the formula or something because I have had 2 split as well. And this business about sending it back with a $10 to return repaired is plain crap but it is absolutely what they tell you.
If you can find an old set of bipods, they are worth the price. If it is the new gray set, walk away. I have tried to contact them about this, but I get left on eternal hold.
If anybody out there has had this same experience, please let me know and I will compile a list and get their attention.