Because every instrument is different.
Because the distance between the ball clamp and the core clamp on the string winding machine is a fixed distance.
For example...
All La Bella strings have an OVERALL length of 47"... This is the length from Ball End to the END of the string.
Their Long Scale strings are 37" Ball to Silk, this will leave 10" of silk wrapped string or wound string for the tuners.
On a Short Scale instrument they now have ALL of their strings at an overall winding length of 47" while the silk starts or windings end at 32"... This leaves 15" of length for the tuning posts.
Now, they USED to do their D and G strings shorter on their Short and Medium scale sets... This is great for users with Hofners or other 2+2 instruments,,, but now that short scale P-Basses and Mustang basses are becoming more popular there are more inline 4 headstocks out there... This would make those 2+2 optimized sets useless and the user would be stuck having to purchase long scale D and G strings. I noticed this trend and insisted they had to change it.
Because the distance between the ball clamp and the core clamp on the string winding machine is a fixed distance.
For example...
All La Bella strings have an OVERALL length of 47"... This is the length from Ball End to the END of the string.
Their Long Scale strings are 37" Ball to Silk, this will leave 10" of silk wrapped string or wound string for the tuners.
On a Short Scale instrument they now have ALL of their strings at an overall winding length of 47" while the silk starts or windings end at 32"... This leaves 15" of length for the tuning posts.
Now, they USED to do their D and G strings shorter on their Short and Medium scale sets... This is great for users with Hofners or other 2+2 instruments,,, but now that short scale P-Basses and Mustang basses are becoming more popular there are more inline 4 headstocks out there... This would make those 2+2 optimized sets useless and the user would be stuck having to purchase long scale D and G strings. I noticed this trend and insisted they had to change it.