Road mine for the first time today it was bloody brilliant, however the hills near me are buggers to get up on a road bike let alone a MTB , Fooly lane etc over 20 % in some parts , so 42 on my little ageing legs will be a problem ish, i have googled and googled and it seems that a replacement 46t Sunrace looks a good option or maybe a 50t anybody tried this or could advice me :-)