That said, we have tried the Lux 141 string. The thickest we have been able to find so far.
If performance is not an issue, try it, otherwise, all things considered, we like the Big Banger 138 overall.
Even when a lower tension is requested, the local stringer will often think s/he “knows better” and will string closer to 60+. Or, their equipment is mis-calibrated.
Of course, the pros string tension depends on surface, temperature, humidity, the balls, etc. And, they have freshly strung frames for every match.
The image shows Nadal at 55 lbs and he probably takes one of the biggest if not the biggest swing at the ball.
At this time, our favorite is the Ashaway Crossfire II.
1.30mm braided Aramid main string matched with a 1.30mm Synthetic Gut cross string creates a hybrid combination with maximum durability and toughness.