On all my basses it's 50-105. Used to be 45-105, but the extra thickness adds a little bit more to the DG strings. They don't feel as lost countering the EA strings. My birds have 50-110, the extra tension on the EA is great for drop tuning & stable in half step down (I keep one in e flat, one in D standard). Sported D'addario 55-110 for a while before dismantling my epiphone un-gothed bird, & the 55 was too much. My tigerbird has hartke strings i found dirt cheap at my music store with the 50-110 gauge. Gonna try DR Hi beams next, maybe rotosound.
P.s. I'm a D'addario string user exclusive (guitars & bass), except for the Birds due to the 50-110 gauge. I've tried other brands: ernie ball, elixir, GHS (which i actually miss, maybe my next bass I'll get some GHS boomers), but D'addario always proved to be the one to hold true. They age nicely unlike ernie ball, & i dislike elixir because of the coating it just doesn't feel natural.