The Kurt Kinetic trainer makes what they call traxles that can be used on older trainers. They cost about $35 dollars and are specific to the bike brand. They do work on trainer brands other than KK.
https://smile.amazon.com/Kinetic-Tra...s%2C180&sr=8-1
Looks like price has gone up. Check KK website for bike brand to thread size.
__________________
2011 Trek Madone 5.2 WSD
2009 Trek 2.1 WSD