If you are sure, then just see if you can find a smaller ring to replace the 42 with. However depending on what the PCD/BCD is for that crank, you may not be able to go that small.
You still have the option of looking for a 2x crank with a smaller rings. Or you can put a single on it. In both cases you want to know what your current BB is. I'm assuming square tapered and possibly a cartridge BB. The shell if likely BSA thread and 68 mm wide. So you need to look at whether your current spindle width will give a new crankset the same chain line or not. Many times chain line is a hard to find spec. And different cranks can be designed for different chain lines depending on what they expect the number of gears on the rear to be and also just simply on what spindle length they expected.
And if you are willing to replace the BB, then you open up a lot more cranks to look at. And their BB that is compatible with BSA shells is probably only going to set you back < $20. Though many require special tools. But your LBS will probably install them for cheap..... if you purchased the right stuff!
Last edited by Iride01; 09-12-22 at 05:01 PM.