If the bass has a long scale, perhaps the Evah Solos would give the tension you're looking for. As far as whether they're long enough, this from the Gollihur website: 4/4 bass? Pirastro designs these 3/4 size bass strings to fit on a standard 3/4 size bass and most 4/4 basses. They may very well fit your bass if it is larger than 3/4. For your reference, the length of a representative string, as measured against the bass tailpiece to the nut is 55.5 inches (51.5" playable, 4" for silk-wrapped afterlength), plus an additional silk-wrapped 11.75 inches to handle stringing in the pegbox.