The 453 is rated to 50 tooth max with 20 tooth range this comes from shimano .
I'm trying to buy / locate the proper FD for my Ultrgra triple 9 sp 2004 vintage ( flat bar conversion ) & I'm running a 10 sp chain
At this time I need to count my big ring . I know my small is 30 . My shifters are xt 9 speed 2002 vintage