Don't just focus on your lowest gear, I'd look at your overall gears and how you use them.
I assume you have a 28/38/48 triple in front and an 11-32 cassette with ? sprockets on the back.
How often do you use your top gear, do you like to pedal downhill at +30 mph or start to freewheel at ~25 mph.
If you don't use it that often then starting the cassette at a 12t sprocket may give you a better/more even range of gears.
eg:- going from a 11-32 to a 12-36 with a 9 speed cassette.
But you may need a mech extender to use a 36t big sprocket which may make your overall gear shifts less crisp.
But that depends on the number of sprockets you have.
Shimano is always conservative on derailleur capacities.
So it's normally ok to exceed them by a couple of teeth.
So another option is to put your bike in small/small and measure the gap between the chain and the bottom of the front derailleur cage.
The chain moves down by 2mm per chainring tooth reduction.
With 5mm or so you can reduce the inner ring by 2 teeth for something a 26/38/48 triple.
Plus 10mm then middle by 2 and inner by 4 for a 24/36/48 triple, that will give you another gear down without altering your back cassette.
And I've run a 22/36/48 front triple but than was right at the limit of what the derailleur could cope with so not really recommended.
But as you open up the difference between ring the shift may well be less crisp, especially under load.
Luck ...........
