Estimating Monofilament Backing When Using Braided Spectra

Estimating Monofilament Backing When Using Braided Spectra

How much monofilament backing will i need beneath my braided line top-shot?

This is a nifty mathematics calculation on how to estimate how much monofilament backing you will need to use with braided line top-shots.
 
In this situation we are using a Shimano Sustain 5000 spool which  holds 200 yards of 12 lb monofilament. and we want to use a 150 yard top-shot of 20 lb braided line.
 
How much monofilament backing do you need to fill the spool space?
 
What we know
  • spool holds 200 yards/ 12 lb monofilament
  • 12 lb monofilament diameter =  0.014”
  • 20 lb braid diameter = 0.009”
  • We have 150 yards of the braid

 

 

Calculate this
Now that you know how many yards of monofilament you need, how do you measure the 100 yards of monofilament?
Use a mechanical line-counter like the one in the photo to the right.