Thank you , from what you have said , I will stick with the 19t one for now , not a big job to change it , once I have the bike on the road , and feel a need to !
I too tried a 21
In my case it eas because the club always seemed to end up on an expressway
Fie on the flat & I could keep up with the A 65's but anything that loked like a hill and it was back to 2nd if not 1st
