with a 44T ring?
The Largest Site Dedicated to Light Weight Bikes and Sales
The difference in diameter is miniscule between a 42T and a 44T ring.
In my experience f derailleurs are pretty universal and able to shift ring combinations that they weren't designed to.
I regularly run road double f derailleurs with mtb cranksets and also haven't had any problems using an XTR f derailleur designed for 46/48T rings on a 53T road ring.
*** --- *** --- ***