I wouldn't go higher than 51*16 for training. I was on that yesterday and it was fine.
I recommend you ask one of the coaches what the restricted gearing is for your age category. The benefits to technique and avoidance of long term injury are worth it. Plus it shouldn't hamper you. There are juniors scoring points in the A Cats on restricted gears at track league.
I wouldn't go higher than 51*16 for training. I was on that yesterday and it was fine.
I recommend you ask one of the coaches what the restricted gearing is for your age category. The benefits to technique and avoidance of long term injury are worth it. Plus it shouldn't hamper you. There are juniors scoring points in the A Cats on restricted gears at track league.