It depends. It's almost certainly on a wooden tree so, in theory, yes, but it depends on age, how much it's been adjusted, and whether it's now the wrong tree shape - sometimes widening the tree will cause other issues and it's down to tree shape. Changing the width doesn't always solve things. As always, in the first instance, consult your fitter . Some fitters point blank won't adjust trees at all, others will a tiny bit, and others will only do it by sending it back to the factory. As a fitter I can assure you that bodyworkers can tell when a saddle may be causing issues, but many of them get the cause of the issues, and how to rectify it, wrong.