I have a Bosch ART 23 Combitrim which uses nylon line 1.6 mm dia. There is also the option of a more robust 2.25 mm line, but this comes in precut fixed lengths, with a central metal crimp, and fits in a different spool, to be used double-ended.
In terms of line wear, the thicker line is, unsurprisingly, much better, but the price of the precut lengths is prohibitive.
It would clearly be possible to buy a length of thicker line and wind it onto the standard spool. I can see that auto feed would probably not work, but when does it?
About the only practical downside that I can see is that the thicker line would produce greater unbalance forces when in use. Has anyone else beefed up their strimmer line, or got thoughts on why it might not be a good idea?
Chris