Punkawallah
Veteran
Out of interest how hilly is hilly and what's your lowest gear ratio?
‘Gear inches’ might be more useful - tyre and wheel size vary the ‘effective gearing’.
For instance, my 34t front & 28t rear give a lowest figure of 28 gear inches for a 622mm rim and 28mm tyre, but 29 gear inches for a 630mm rim and 28mm tyre.