A 125 B string has never been an issue for me using DR Strings. I have heard other opinions concerning other brands. Because it feels more natural within a six string set, and all DR six string sets have a 125 B instead of a 130 B (there are both 125 B and 130 B options via five strings sets), I am now very used to it, as well as 130 Bs on my other basses. A 105 E is on all of them.